Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9fabdeea41b531…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 09:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60ea27f81bf13eff69dee877264e55dc SHA-1: 98e674db7af2204852c7b82f2977ba40403fb224 SHA-256: 6f9fabdeea41b531ae7c8ce0eac887fa34f97efb2616ade8d0fbd583f099f862
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL for the malicious redirector. This suggests the primary goal is to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, and the family is unknown.

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.com/wb?keyword=luxacion%20definicion%20pdf
    • http://files.patricknortonillustration.com/uploads/1/3/1/4/131437949/rusawa_mezotenenesila_rarub_ravabijafajeko.pdf
    • http://nimizakep.rebeccabrillweitz.com/uploads/1/3/1/0/131070792/dosapovof.pdf
    • http://files.myprojectindia.org/uploads/1/3/0/7/130775413/180464.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/principles_of_language_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/98663164449.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/88270802086.pdf
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/17051293358.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4411/files/mejarizapaluzumilukudam.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/cell_communication_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/fajunomavakezefisomu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/72643480971.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/tent_camping_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/30391216639.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/54417224588.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006736.bin
96e68e764a1f9ae9a86e2d6dde38662cccf8fc8e414494d4735ca8878d181a38
pdf-font-stream PDF embedded font (sfnt) at offset 0x6736 4852 bytes
font_01_sfnt_off000077d1.bin
49db823ffe0e281c7d367a1e62a746ee81eecb504fc301afadc82c60c6c85832
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D1 11216 bytes