Malicious PDF — malware analysis report

Static analysis result for SHA-256 6975848313ee08ef…

MALICIOUS

PDF

39.9 KB Created: 2020-08-18 19:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c063d0fbe833137360985a5c3d7238fc SHA-1: ae90c3b3dfb8307dd8c0ad1887852f386b084725 SHA-256: 6975848313ee08ef2f56fdf75f2cc40f3f80b74fbed7eff43be1bb08dda87296
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a known malicious redirector, indicating an attempt to direct users to harmful content. The heuristic firings suggest this PDF is part of a link farm, likely for SEO manipulation or to host malicious content. No scripts were extracted, but the presence of malicious URLs and the ML classifier's high confidence point to a 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.com/pify?keyword=d+n+a+full+form+in+medical
    • http://kajafadab.alexandrakcooper.com/uploads/1/3/1/4/131453574/pasevixeda-ledulisaker.pdf
    • http://files.10sided.com/uploads/1/3/2/6/132695416/7f5e4b3917.pdf
    • http://files.reframephx.org/uploads/1/3/0/7/130776542/dupuvowime-sujen-bifujigar-kujubojo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/82777382351.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/kopifevoxepuxovux.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/76678907824.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/68367141015.pdf
    • https://cdn.shopify.com/s/files/1/0450/1677/6868/files/93132116706.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/pojenogujikamopupoxudix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/61858623017.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/37226168124.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/aha_stroke_guidelines_2015.pdf
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/roper_washing_machine_manual.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_off00005fd6.bin
f3aa03c9d408db65f905494751d4d3be2d9a84ddd9ff769f70c6f71a6b2e1652
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD6 4988 bytes
font_01_sfnt_off000070b5.bin
31d90c6e0235b375e53210d514bc6bda49fd5f80327a0118caa196334253e11e
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B5 10140 bytes