Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c359a496b41a1f…

MALICIOUS

PDF

44.8 KB Created: 2020-07-12 09:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 005ce9d39da22e124b8589ad2733861b SHA-1: bf953974bb497cf74c80e3cfe2a22267a4e03517 SHA-256: f3c359a496b41a1f850428165b9d6e8adbbd619bd56c9c4551101f43728f6b23
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and other PDF links, suggesting a lure to external content. The primary malicious intent appears to be redirecting the user to the ttraff.com domain, likely for further exploitation or phishing.

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/pify?keyword=se+rep%25C3%25A9rer+sur+un+quadrillage+ce2 In PDF document text
    • http://files.gaindetalks.com/uploads/1/3/0/8/130874629/dojoja-kefuzegomoli-wadab.pdfIn PDF document text
    • http://files.mccoyagency.com/uploads/1/3/1/8/131872054/5927881.pdfIn PDF document text
    • http://files.bfgcommercial.com/uploads/1/3/0/9/130969874/niwenuve-nolizerizeg-ledifotuximisi.pdfIn PDF document text
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fosapab.files.wordpress.com/2020/06/65781328631.pdfIn PDF document text
    • https://togelejamubo.files.wordpress.com/2020/06/82378129208.pdfIn PDF document text
    • https://sejidinaduk.files.wordpress.com/2020/07/73456495155.pdfIn PDF document text
    • https://gukubulori.files.wordpress.com/2020/06/tubosadevupib.pdfIn PDF document text
    • https://fulivamata.files.wordpress.com/2020/06/vozupeta.pdfIn PDF document text
    • https://wubefeb.files.wordpress.com/2020/06/giboxavogaludasasukarow.pdfIn PDF document text
    • https://disosilawube351438687.files.wordpress.com/2020/06/pisenemiledowipuzata.pdfIn PDF document text
    • https://guwasuxumoz.files.wordpress.com/2020/07/34704174826.pdfIn PDF document text
    • https://zixakexixo.files.wordpress.com/2020/06/migitukiwixaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/89220936791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/vuzajewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93867881616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/bolenokelij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/23596033832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/4767428831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/pozukosukuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/46844268202.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000575b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x575B 5436 bytes
SHA-256: 075ad68aa20d71e4c47f8bbf7bbe6175a6af286a1c2462915064b8ac3239ba0c
font_01_sfnt_off00006980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6980 11248 bytes
SHA-256: 137d67dd2662b8afccb3860ea85920929322d556d3141199a8aeec2a2523c3b7
font_02_sfnt_off00008ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDD 16328 bytes
SHA-256: b5ce1d064fee4832bde3bd34a9e17d2f5863a8d67282b88d5686ca026d844988