Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40e8b84f718edfd…

MALICIOUS

PDF

32.5 KB Created: 2020-08-23 23:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ae3f17099d806fbb0883b49ff87749b SHA-1: 63d682e44dd3a07a0bf3f340fef105844cfa25ba SHA-256: b40e8b84f718edfd1ea338767ff6cce5d9332a538cee10ecbbdf5729e8be669c
140 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign content, but one critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a financial accounting book and the malicious URL. This suggests a lure to trick users into clicking the malicious link, likely for phishing or to download further malware.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=financial+accounting+and+reporting+book+by+millan
    • http://files.inwiththeold.co/uploads/1/3/2/7/132741322/8998510.pdf
    • http://rotetu.montoyaenglish.com/uploads/1/3/1/8/131857419/tonoderevixa.pdf
    • http://bepesotob.woods-by-designs.com/uploads/1/3/2/8/132814977/zafugo-nizologejetolen-lojavixigowutut-laxesiwoludag.pdf
    • https://cdn.shopify.com/s/files/1/0430/7632/1434/files/why_cant_i_hear_people_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/26917805646.pdf
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/67815445746.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/speer_reloading_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/behaviorism_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/the_basics_of_communication_studies.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/occupational_therapy_intervention_for_autism.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2178/files/dukegirefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/lugojogabobunemelipo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/347843801.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_off00004294.bin
0c0b23319ee608b6811c172f0ac49f733fe9da78fd368c3236c41a1ec6f56eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4294 5476 bytes
font_01_sfnt_off00005514.bin
465f6af6c7bd7f1e7f7a9a5c3331347e1c6faed22e25c90526e05c54662683c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5514 9324 bytes

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