Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c8c610576ffc37…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 06:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c462dd531be32a10bbbecfff0d3970b7 SHA-1: 0579c8c38847a1af9a6e68640fc341d37bc4a608 SHA-256: 58c8c610576ffc37735334a77813df24297cef44146fe1a8e8491e5239e6b6ac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a direct link to a known malicious redirector, `https://ttraff.cc/pify?keyword=android+caller+name+finder`, which is presented in the document body. This indicates the primary goal is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=android+caller+name+finder
    • http://fodev.riovistaresorttx.com/uploads/1/3/1/4/131437462/8db93f41f52671.pdf
    • http://bufem.maryknolllibrary.org/uploads/1/3/2/6/132680813/kirizazixorir.pdf
    • http://files.dogfrom.com/uploads/1/3/0/8/130874612/60e793112e663.pdf
    • http://dibis.sweetserwesleyan.org/uploads/1/3/0/7/130775354/b2fb6fcdb5.pdf
    • http://files.mcjpgs.com/uploads/1/3/0/9/130969184/miwaranam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/20863360205.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/femivaxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/mojilanitelefuxada.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/gamit_ng_malaking_titik_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/fapojafotopumanokufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/88646581039.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/amrit_maan_new_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/79405673660.pdf
    • https://cdn.shopify.com/s/files/1/0428/4317/7126/files/33898910347.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/aetna_medicare_formulary.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/zosajox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8311/2341/files/chess_movies_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/55171641992.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/
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/5517164199

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066e9.bin
9143c15e4a6f928837c31743ab22505d3c2b5f19e0b786cc99253d72287d8cc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E9 4976 bytes
font_01_sfnt_off000077b5.bin
6331226294704818a44f172c258de8eff0c3529b334d2221c01acfcee45b9b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B5 10444 bytes

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