Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ac3774d0835a2b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 03:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92fc397da6cbf78fb86d165891942d61 SHA-1: 4c58d4e632b30ee284fbb7ec55c3705b7f75695c SHA-256: d0ac3774d0835a2b53c88dc9f8d22dd790f6f464991850a9dd47c18565a45ddc
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. It also contains a large number of external PDF links, suggesting a link farm for SEO manipulation or to host further malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=chemistry+notes+for+neet+exam+pdf, which likely leads to a phishing or malware download page. The document body, though partially corrupted, contains text related to 'chemistry notes' and the malicious URL, reinforcing the lure.

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=chemistry+notes+for+neet+exam+pdf
    • http://piserolu.samkaestner.com/uploads/1/3/1/4/131407558/9604320.pdf
    • http://files.bhsclassof78.com/uploads/1/3/1/8/131871593/tatizuzokimad.pdf
    • http://files.heysugarcakes.com.au/uploads/1/3/0/9/130969934/471109.pdf
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/zoginabiguginot.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/akashic_records_book_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/wupesapizelowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20659662050.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/gepituda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/tv_guide_for_iptv_stalker.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/21841688489.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/77911565233.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/12953208424.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/55319597972.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_off00006311.bin
7867b4f130326013ea7076a977848fbd391968073d5c5d8852eba9f5cf806ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 5324 bytes
font_01_sfnt_off00007507.bin
e7fa94eeb30e98d4810a6db87c5e6f0845fbee44194fcbf107a2f14756fb871a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 9964 bytes

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