Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec32a8d4efba82a6…

MALICIOUS

PDF

42.2 KB Created: 2020-08-21 11:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3976fb4053ff5bb689ed61a47011e6c5 SHA-1: 4e7e5e40fbdb5d6ac04e62200d25e24598235bba SHA-256: ec32a8d4efba82a6c1a3cebca19f6d9d6afd91a1f05df90c520d096a765f85e0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=ftth+council+report`. The document body, though heavily obfuscated, contains text fragments suggesting a report lure. The ML classifier strongly indicated maliciousness, supporting the interpretation of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ftth+council+report
    • http://files.kemptvilleacademyofmartialarts.com/uploads/1/3/1/0/131069992/9817940.pdf
    • http://bidobuxus.peterandpaulapixie.com/uploads/1/3/1/4/131454215/kuduj-lumataw-wenuxewud-bofixev.pdf
    • http://pobolo.purecolorartist.com/uploads/1/3/1/4/131409090/1201071.pdf
    • http://folupe.bayareamuslimtherapists.org/uploads/1/3/1/3/131379163/1096155.pdf
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/cards_against_humanity_print_and_play.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/rowesixevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/zanuvan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8480/files/72188354784.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/21074837218.pdf
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/35385669479.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/94906664299.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/76900042858.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/33035690500.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/abandono_infantil_psicologia.pdf
    • https://cdn.shopify.com/s/files/1/0434/7291/2549/files/pifobapokobudapena.pdf
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/chennai_express_movie_480p_bolly4u.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/31508618140.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_off000067e2.bin
69ce928836ce379c923007b4b24001b075bdf43f0a7cb8400e4dbedc3e4ec4be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E2 4588 bytes
font_01_sfnt_off0000776f.bin
4db81a71c1900325dad6979a256038425e362ae141aee78120e6dc99229fbd62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776F 10640 bytes

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