Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99ea438f5b825f9…

MALICIOUS

PDF

36.2 KB Created: 2020-08-19 12:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fb1f59e2880b556f58e957518db03af SHA-1: 3ee7658000def93e3f80f683dbe6a3a0be7d4790 SHA-256: a99ea438f5b825f936e69be4e00464529638ce21f1b78aea5ffb06b8895bc8ad
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to an 'internal audit report of pharmaceutical company'. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy to potentially obscure the malicious redirector.

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.ru/pify?keyword=internal+audit+report+of+pharmaceutical+company
    • http://pamazej.aano.org/uploads/1/3/2/8/132814742/621527.pdf
    • http://files.oregonsummerclassic.com/uploads/1/3/0/7/130739719/nugifusuju.pdf
    • http://files.niagaramodel.com/uploads/1/3/1/4/131452878/2235489.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5263/files/soxuresijafinelenojurin.pdf
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/angular_6_nested_formgroup.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3045/files/corporations_examples_and_explanations.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7431/files/30649424157.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/wubiroxesadiloxemegonari.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/tessa_blanchard_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1065/files/state_policy_on_multilingual_education_in_odisha_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/nespresso_vertuo_capsule_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/jajipurinubexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/29205934537.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/pufidamimafigasokojuwulup.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/4346060069.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/nuzavuvobuxurejotib.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_off0000500d.bin
321e257b185cf752db60b01ea109d0d1c0c50f8080d1590489ec29b4a3bdfc71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x500D 5256 bytes
font_01_sfnt_off000061c1.bin
6183f57ed96cea5dd400b18f9c9bd0a7d4b2d5b0dde1d48a6ac1d1e527467a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C1 10028 bytes

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