Malicious PDF — malware analysis report

Static analysis result for SHA-256 491b2ee0c42e59b3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 19:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e3167f80c772f08c244a2a466cc3e68 SHA-1: 481ee0cc5ce8e0c57854b660c17d72459c3c7c08 SHA-256: 491b2ee0c42e59b3e3f964c38455d423dc710416d7b2b9b752acfb95525fb50e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of outbound links, many hosted on Shopify, likely to obscure the malicious redirector. The document body, though heavily obfuscated, contains text related to accounting templates and the malicious URL, reinforcing the lure.

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=free+accounting+spreadsheet+templates+excel+uk
    • http://zudabi.ulstl.com/uploads/1/3/1/3/131398560/ligewozidujumovumoma.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/giwutolifof.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/plural_form_of_radius.pdf
    • https://cdn.shopify.com/s/files/1/0446/1415/6451/files/synonyms_asked_in_competitive_exams.pdf
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/51608052014.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/gilunofizetimojabutazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/30394369388.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/vexoluzupuvopogafitumow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/parimi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/aura_libro_carlos_fuentes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1639/files/apache_camel_developer_s_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/honda_ct70_parts.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/42019839849.pdf
    • https://cdn.shopify.com/s/files/1/0439/3048/4904/files/23465417430.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/chhattisgarhi_video_ing_hd.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_off00006149.bin
432898aec0d1083291b1bb2cffeaf3b95938fee52d2a66519995a7d8212090c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 5576 bytes
font_01_sfnt_off00007415.bin
d276779995bcc72a39475966c76a29a2e2088ec7b6bbdeb2df097e8a59dd5330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7415 10044 bytes

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