Malicious PDF — malware analysis report

Static analysis result for SHA-256 2526626b80516341…

MALICIOUS

PDF

42.9 KB Created: 2020-07-31 19:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09d55668c5b7811753efe841d962553 SHA-1: f36decd35ac1f9bae956505741edb6d814c1f6a3 SHA-256: 2526626b80516341073697b0e182cf10f15fc2c37dc71b9b6340f8e174028a8a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=maytag+refrigerator+manual'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=maytag+refrigerator+manual
    • http://files.helenjonesart.com/uploads/1/3/1/4/131406736/jofarukoboguxagi.pdf
    • http://files.bcrtech.org/uploads/1/3/2/6/132681479/sugemuxowopazaw.pdf
    • http://files.thecolorfulcreations.com/uploads/1/3/1/4/131437477/dojemapesepubir.pdf
    • http://files.ifixmarbella.es/uploads/1/3/1/8/131856158/8576606.pdf
    • http://files.valleycreekfarm.net/uploads/1/3/1/0/131070604/fikononajum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8768/files/sagojofes.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/nonidagekubidibijufowe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/61990806368.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/29707787208.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/416351594.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/sabokozakowotoku.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/domawibatozim.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/zivagunogewakoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/sineziritanaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/76482974608.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/momegup.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/futulomikoliwakinemot.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6688/files/59625780685.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000690f.bin
5321de0fa4ee46a048a330d1c96427be08b4d7ee0d5f6de8cce50f472e049365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690F 5016 bytes
font_01_sfnt_off00007a25.bin
651c8e2bd3e21f9cc64b156280fe52c044067443084077a8d0275e8817eba111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A25 10692 bytes

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