Malicious PDF — malware analysis report

Static analysis result for SHA-256 911a68120351c7c1…

MALICIOUS

PDF

44.9 KB Created: 2020-08-22 12:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91bb6efca06740bc6f76f78011bae616 SHA-1: f5ce38930269c856e311e466cb1bc9fd26654022 SHA-256: 911a68120351c7c13f0c7fb410fbfb675db72845c8830b9e346fb9ac3d27f960
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though partially corrupted, contains text related to a crossword answer and the malicious URL, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to malicious sites. No scripts were extracted from this sample.

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=without+qualification+crossword+answer
    • http://files.shapiropage.com/uploads/1/3/1/8/131860125/vusikaxif.pdf
    • http://zugiworar.en-technologiesinc.com/uploads/1/3/1/3/131398564/bupifusumujosasuze.pdf
    • http://files.ageniart.com.au/uploads/1/3/1/8/131856950/pimemataf-zidukegatufatak-lijum.pdf
    • http://vumobusef.theletiziafamily.com/uploads/1/3/0/8/130814017/6689249.pdf
    • https://cdn.shopify.com/s/files/1/0464/5771/6904/files/jungle_animal_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/punjabi_bhajan_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/dofitetadanu.pdf
    • https://cdn.shopify.com/s/files/1/0445/5625/5396/files/70824999507.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/47533730944.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9222/files/greedy_algorithm_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/best_app_to_read_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/4297122888.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/depamota.pdf
    • https://cdn.shopify.com/s/files/1/0464/5231/0184/files/90860985290.pdf
    • https://cdn.shopify.com/s/files/1/0447/3402/1788/files/88638619018.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/lizemapawabamumed.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/63569632086.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_off000070fd.bin
b20118efc3026e899c848055e7b26098e5f46a7df07767578dfba515cce4a34d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FD 5340 bytes
font_01_sfnt_off00008332.bin
83fcca3917b260d7f52ad630c2df80973209deb8285bb48fb0323d968716445c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8332 10340 bytes

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