Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cccc88d0e994b7…

MALICIOUS

PDF

38.6 KB Created: 2020-08-27 23:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d3b8ea3c65e164dfd4b84ba7e40e218 SHA-1: f10f680f4679c6dd152898d0496eaf7dae4ff7a3 SHA-256: 12cccc88d0e994b7321965da16c364f24177c0b4536b7d98e10a62f3c8c8cf18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=the+gendered+society+kimmel+pdf'. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites.

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=the+gendered+society+kimmel+pdf
    • http://files.hiddenvioletsconsulting.com/uploads/1/3/1/4/131437474/tojat.pdf
    • http://webed.moodyplumbinginc.com/uploads/1/3/1/4/131438044/3458667.pdf
    • http://files.affordableallwoodcabinets.com/uploads/1/3/0/8/130814907/gejedav_verugevadomux.pdf
    • http://files.johnsondistributioncollc.com/uploads/1/3/0/7/130739107/latava.pdf
    • http://mexobiku.mayflyguides.com/uploads/1/3/1/3/131380550/4c06c70ade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5462/0054/files/683613354.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/50151343459.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/zanebazurujonefogipoge.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/bezatab.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/molten_glass_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/97635800404.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/93618334465.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/bahubali_audio_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/genuzulosefatizuvig.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_off000057d8.bin
bcd82f37f77603205f2d6d5f3345f46ffc2376808fc0590fbac7845e6afb40c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 5476 bytes
font_01_sfnt_off00006a5b.bin
11a74b0f7762813fc89966a82c1d02cdabda83b6c26046adc30f197c0fe98350
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5B 10484 bytes