Malicious PDF — malware analysis report

Static analysis result for SHA-256 709c3309a815f2a1…

MALICIOUS

PDF

52.2 KB Created: 2020-07-31 08:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f9e9ea28cdbf5a78fef5f0dc5926ca1 SHA-1: 260d426476c94ffbdfb7c8aaec7a4acd48750e45 SHA-256: 709c3309a815f2a1347c06d86f3b0bd5daaff3674d3a04dddcd23bfb64b9d3e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic indicates a direct link to known malicious redirector infrastructure, which is the primary indicator of malicious intent. No scripts were extracted, but the presence of embedded URLs and the link farm structure strongly suggest a phishing or malware distribution vector.

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/wb?keyword=graco%20click%20connect%2035%20lx%20manual
    • http://files.tacklingsuccess.org/uploads/1/3/2/6/132695571/6285414.pdf
    • http://files.biljohnson.com/uploads/1/3/0/7/130738752/202044.pdf
    • http://files.carpetcleaningvisalia.com/uploads/1/3/1/1/131163747/wuxoribuberaxerulum.pdf
    • http://files.maddiebooks.com/uploads/1/3/2/6/132682792/zesatawuvemu_zofabaxalogezaj_mavujenatijit.pdf
    • http://files.rafwestraynhamassociation.org/uploads/1/3/1/4/131452867/rurefu-bibixovawutuv-bodatefulupusik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/jirolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/62487271561.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/neselunolefatanofumuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/28375774772.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/51008890665.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/21969506471.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/pugonelawarezabu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/88490257821.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/71375403920.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/dorejuzujinazevijaxef.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/50278694849.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/86777911630.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/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a84.bin
7eb21ab000e246c294532749bdd64b9bb358c5345be201891dcf1e3abfa998d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 5100 bytes
font_01_sfnt_off00008bc5.bin
50c2aa038c237838a45a89cd5070754901a41ea606e3fa1a6ab494cf6708f591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC5 6524 bytes
font_02_sfnt_off00009ce8.bin
1320abe5e1406661abfefd67d65609959e8d6ba108ab6bb0e64eaa3382ec1e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE8 10896 bytes

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