Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a42c3c38e580f52…

MALICIOUS

PDF

38.7 KB Created: 2020-08-21 09:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e6cd485a7f6fac539613e14c05a2540 SHA-1: f9d8b41fb5edea4425198ca177ab9cb90b641e5e SHA-256: 4a42c3c38e580f52f41115bd22f82d5c669cb84a9db6ceef90a4cce9e8d1a134
120 Risk Score

Malware Insights

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

The PDF contains a deceptive message suggesting a problem with printing, which is a common social engineering tactic. It embeds a link to a known malicious redirector, ttraff.com, likely to lead the user to a malicious payload or phishing page. The document also contains a large number of links to external PDFs hosted on various domains, including Shopify, which is indicative of a link farm or SEO poisoning attempt.

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.com/pify?keyword=sua+loi+file+pdf+khong+in+duoc
    • http://files.gnslasvegas.org/uploads/1/3/0/9/130969001/tulumot-jugoz-tukuwivi-dodal.pdf
    • http://jofoz.annascafebar.co.uk/uploads/1/3/1/8/131857334/nerikizowepibavuliv.pdf
    • http://files.chapinmarino.com/uploads/1/3/0/8/130813663/b75a82.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/vysor_chrome_app_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/aeroporto_bologna_destinazioni.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/letters_coloring.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/foradenemazife.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/admission_form_aiou.pdf
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/terevogonurapewezuboxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/staight_outta_cashville.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/business_plan_sample_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/generation_z_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/76342839913.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3880/files/overhead_door_model_2026.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/bubenikijoxapuzazipo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4234/6907/files/ditusemaxotasodoriwizibu.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_off000059ac.bin
882c84fde5296da04d74b960a7f39e199ce80177cb71e58992e3ecffb9f63763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AC 5308 bytes
font_01_sfnt_off00006bbe.bin
a7e78649eb55c0724dddd911081cdd04eb1c16480cf3da03ce05a6210f4c0b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBE 10080 bytes

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