Malicious PDF — malware analysis report

Static analysis result for SHA-256 11aeaa6ebd3424c3…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 00:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 473d74d2e073883fe7f30ca3b4580c81 SHA-1: 43a3be4579d455b9098ddbdf5a36bebc18a8cbe8 SHA-256: 11aeaa6ebd3424c3e1d4ade0a15a7c14a384acf962fdecd8657fa7da340eab32
162 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to free PDF conversion tools. The presence of multiple Shopify-hosted PDF links and a malicious redirector indicates a link farm strategy to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=pdf+to+dwg+online+converter+free+download
    • http://jusamu.transformingyourhealth.com/uploads/1/3/2/7/132740214/tigitaxemuvarix.pdf
    • http://files.soulsurvivorsband.com/uploads/1/3/1/1/131164260/wanawewolekiro_zugotu_jubawikusi_zeluzexalidowi.pdf
    • http://files.hkgoldendragonawards.org/uploads/1/3/2/8/132815791/01f31.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/wunas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/35646968187.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/50409525471.pdf
    • https://cdn.shopify.com/s/files/1/0434/6308/2146/files/ceiba_pentandra.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/97574398079.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/69390396354.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/30315700999.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/tegaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7181/5331/files/how_to_make_sub_bookmark_in.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6602/files/carry_on_mr_bowditch_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/0138/6920/files/73751889196.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/63559417982.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/32740472810.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/cell_line_culture_protocol.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006452.bin
4d231e863bbf334574bdbbc5419b3bba7e752ae675b8e0443b0c5d646c74e215		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 5164 bytes
font_01_sfnt_off00007607.bin
0c5925af5a950e7aa245630daa415ba06238810cda92c4ebc419ac5741e90df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 10316 bytes

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