Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43da82d0cdbe1a6…

MALICIOUS

PDF

33.2 KB Created: 2020-08-06 15:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 687c7d154ad3739b6542012c84d39204 SHA-1: 7cbf69429f549da74e5b03473138f53ffa77a8f8 SHA-256: d43da82d0cdbe1a6ab020409f63acc3c860b9b86e66b28fa316bd03b42cbfa62
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.cc', which is flagged as malicious. Additionally, it hosts a large number of external PDF links, many of which are hosted on Shopify domains, suggesting a link farm or SEO manipulation tactic. The document body contains text related to 'writing answer sheet ielts pdf' and the wkhtmltopdf application, likely as a lure. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=writing+answer+sheet+ielts+pdf
    • http://demeru.truenorthcommunitychurch.com/uploads/1/3/1/3/131398591/wakuvanutazenen.pdf
    • http://files.ginasbookplace.com/uploads/1/3/1/4/131437848/6984538.pdf
    • http://files.depoorters85.com/uploads/1/3/1/4/131406563/petepok-sitirodifaf-zixow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3317/3927/files/holy_quran_with_urdu_translation_kanzul_iman.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4166/files/34930051370.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1719/files/python_script.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/2._54-_0_11._4_old._firm.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/49179170685.pdf
    • https://cdn.shopify.com/s/files/1/0449/3757/6603/files/free_woodworking_plans.pdf
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/gatemupedukirudinimabeke.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/download_ebook_bootstrap_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/xatolugugibimimop.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/nusaweramasosugobomijid.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/26000671358.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/komuzabunodasawalil.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/vajemevufoxiperewapiwil.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_off00004589.bin
b5e182e221d2688582ba4b7e62868adf82ac968c79c9f6bfaebc0759af3b6599		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4589 5408 bytes
font_01_sfnt_off00005802.bin
6a7f21522c7e2d38d79cfb1cf6247feee0dddd6009d993c57a8b3ab7850cf8e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5802 9352 bytes

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