Malicious PDF — malware analysis report

Static analysis result for SHA-256 65188954f3530853…

MALICIOUS

PDF

43.2 KB Created: 2020-08-08 12:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8652e17cb5de398f55ee4d0c9dac7ed1 SHA-1: 9bea975539c86159192ecb6d2789eb8286b0ce1e SHA-256: 65188954f353085364b64440bbc978f05f8cffe0aaf67bcc7e2cc6f1e07627c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a pattern of hosting numerous links, likely for SEO manipulation or to distribute malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=what+is+economic+globalization+pdf
    • http://files.darinadenali.com/uploads/1/3/0/8/130874125/sesoj_bugidiwibo_renosekepovi.pdf
    • http://sazom.ornimetal.com/uploads/1/3/1/6/131637136/mujodamaf.pdf
    • http://files.mtmaiello.com/uploads/1/3/0/7/130739776/tusedarufirasud_liresutu_xogasu_fumipus.pdf
    • http://sojinivor.theillustratedopossum.com/uploads/1/3/1/4/131453540/xijewunositevodo.pdf
    • http://files.thekissroom.com/uploads/1/3/1/4/131452867/72e2c29979fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/sanubemigelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8509/files/jekusuripibewoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75815848510.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/49952430266.pdf
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/calvary_temple_songs_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/60245588250.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/lupowulevabivemazupaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/xigazolugujomalusavefeni.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/cartesian_dualism_mind_body.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/jotafutugivexowinovaju.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_off0000674a.bin
1db643dd412f9b564e999c05aefed7620510ff90f3225205dbf565bb83fe60c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 5676 bytes
font_01_sfnt_off00007a87.bin
0a96afccb5a2a8f0c700f63476d799ee373d0cf69b7820a1c59da6cd5cb2b62c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A87 11016 bytes

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