Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb58005375bd018…

MALICIOUS

PDF

48.4 KB Created: 2020-07-11 21:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: af91f3a54a63e6988266652652641b71 SHA-1: 8839907d9d83384b796e56bb8891a87085b722b7 SHA-256: deb58005375bd018cab7f3ab79f55f36b59deb464a325a2d5f450aa116553aa0
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure for an advance-fee scam, instructing the user to enable content to view details about a prize or parcel. It includes a malicious redirector link that points to 'ttraff.cc', which is known to host malicious content. The document also functions as a link farm, directing users to numerous other PDF files hosted on various domains, likely for SEO poisoning or to spread further malicious content. No scripts were extracted, but the presence of the malicious redirector and the advance-fee lure strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=introduction+to+java+programming%252C+brief+version+%252811th+edition%2529+by+y.+daniel+liang+pdf In PDF document text
    • http://files.cffu.org/uploads/1/3/2/6/132683111/bazakekukaxatiwi.pdfIn PDF document text
    • http://files.aliceannephotography.com/uploads/1/3/1/3/131379447/xisejexopore.pdfIn PDF document text
    • http://files.halfgodtactical.com/uploads/1/3/0/7/130775102/c6457.pdfIn PDF document text
    • http://files.srmta.com/uploads/1/3/1/1/131164308/lofezepijiv.pdfIn PDF document text
    • http://files.grapes.global/uploads/1/3/1/8/131859895/8117021.pdfIn PDF document text
    • http://files.celebrationonwells.com/uploads/1/3/0/7/130776514/5725286.pdfIn PDF document text
    • http://files.mrhebert.org/uploads/1/3/1/4/131408528/a536ed45f7eada.pdfIn PDF document text
    • http://files.baileycreekdoodles.com/uploads/1/3/2/7/132740552/jifawusologen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tolefeguxi.files.wordpress.com/2020/06/fovidewilemasovu.pdfIn PDF document text
    • https://bikixaxapu55491205.files.wordpress.com/2020/06/44590109343.pdfIn PDF document text
    • https://zebutenot.files.wordpress.com/2020/06/bojedaranebaxirin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/sinaxemitugew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/gatemupuwapavikevopesew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/petapadajawodagagatefadez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53151925343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/6111907493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/8094815901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/43137602834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/dofavuwowinenukimow.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8A 6060 bytes
SHA-256: fe4293ca71253bdfe3991ed7c4421c303c43028b82e42c439f097133e8c148f0
font_01_sfnt_off0000902e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902E 10236 bytes
SHA-256: b2e0cd7fc90694e2babcbd52268e7fe2d99f9e4da2ea084ce706a11b652c2359