Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27941d08aae0bd7…

MALICIOUS

PDF

46.4 KB Created: 2020-07-20 12:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 8c8b3953e6d05d0070f23c5b4ade389d SHA-1: 89df8019ebc055e619ab97f28cb76263c7776262 SHA-256: d27941d08aae0bd7c9b0dcf2976da0a582ecd352b5c5925af23cbdaa85ecf314
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm hosted on Shopify. One of these links, ttraff.com, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'photo convert to pdf file online', suggesting a lure to disguise the malicious redirection. The presence of a malicious redirector link indicates an attempt to lead the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/wb?keyword=photo%20convert%20to%20pdf%20file%20online In PDF document text
    • http://files.keithsfishingtackle.com/uploads/1/3/1/0/131070751/purekufo.pdfIn PDF document text
    • http://files.landfallcert.com/uploads/1/3/1/3/131379111/6170381.pdfIn PDF document text
    • http://files.united-townfinancial.com/uploads/1/3/2/6/132696210/a2a174cfc.pdfIn PDF document text
    • http://files.ggsbbq.com/uploads/1/3/1/1/131164095/2f305a49de2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/lupemasevuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/wajewutazoferewud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0141/files/67441794381.pdfIn PDF document text
    • https://burunejowol.files.wordpress.com/2020/06/52939393483.pdfIn PDF document text
    • https://nelagudisuz.files.wordpress.com/2020/07/36197832713.pdfIn PDF document text
    • https://femovugogu.files.wordpress.com/2020/07/wamekozedasanonepudapudu.pdfIn PDF document text
    • https://fevunuwunu.files.wordpress.com/2020/07/58481719602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3460/5728/files/lasavebukokigifibotufid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/13465962138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5233/3206/files/7626734980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/86838001269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/nukujawafef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/36928986487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/22141325527.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 4704 bytes
SHA-256: baa38bd33fe0225e03f6da258bed7dbed0f9b38a34332b67d7fbb9f0e8fe20f9
font_01_sfnt_off00007ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC7 14648 bytes
SHA-256: 8e4935c1cd615de4d11c53ee0990a6690a01a0e3857db8c10fa89a2f7ca099ba

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