Malicious PDF — malware analysis report

Static analysis result for SHA-256 821e209645d4ad82…

MALICIOUS

PDF

34.3 KB Created: 2020-08-07 07:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae9f8e83165ac11c1cbe3d7b2719e8d6 SHA-1: 26e3c27813cd8b6ee20338d02b46aaea860f2b4b SHA-256: 821e209645d4ad82dad23428ddca6fbfa31933a882c7a3c310894bc06b0cc86f
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate documents but ultimately redirecting to a malicious URL. The primary malicious link is https://ttraff.cc/pify?keyword=possessive+pronoun+exercise+pdf, which is likely used to deliver a secondary payload. The presence of a visual download button further supports the lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=possessive+pronoun+exercise+pdf
    • http://files.jenniegumption.com/uploads/1/3/0/7/130775952/gowedi-pavemera-veziku.pdf
    • http://files.novelsf.com/uploads/1/3/1/4/131483550/mataxopawowojuvuba.pdf
    • http://files.varlodavenport.com/uploads/1/3/2/7/132740462/5755489.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/82848428024.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/nilibobamusoboba.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4621/files/fejalepalepi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/20905302776.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/13445977919.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/50650861951.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/movie_box_ipa_othman.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/google_apps_script_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/emerald_tablet_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/gasibosedekowapidu.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_off00004988.bin
9eb6755116134392c021a50561bdc9c86a702df96b8740e006bbbbf80876c901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4988 5036 bytes
font_01_sfnt_off00005acc.bin
1c1d8f10cf2319228d25d52ac0bad8d80ce4909913666c15c8f0e55bf815bb48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACC 9848 bytes

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