Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be9e4f4699aa179…

MALICIOUS

PDF

44.6 KB Created: 2020-07-23 16:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 176e40c0c886e61d7bdcf1a4473c29f5 SHA-1: 372f6664e67b31d51d7e50b073c7ef2b28ad990d SHA-256: 6be9e4f4699aa179cdb945554eedc39e3b600293fc00a8676e1f44a906e89e53
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, suggests a lure related to video editing tools. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used to distribute malicious content or improve SEO for 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=best+video+cutter+and+joiner+apk
    • http://files.earlyhorizons.com/uploads/1/3/0/7/130739678/6396433.pdf
    • http://files.bklnmanners.com/uploads/1/3/2/6/132682119/pijuragelesomivejevu.pdf
    • http://files.driftlessareawetlandcentre.com/uploads/1/3/0/9/130969377/691eca19899ef1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4196/3679/files/zeroxuloziri.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/40091260092.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/rixedebekesorugasixofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/mitujalu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/5271393837.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/kofexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/dujetofibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/47401658855.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/pimodokaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/larixufiveb.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/dusipojukuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/57686955036.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_off00007130.bin
d6ecb1c7aaf40bd13529ad730538735fe3ff4620bece7fb8589048ae14f86f2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 5168 bytes
font_01_sfnt_off000082dd.bin
c27a34a1c3730f421ec601245fb03470a8367bf47f90f41892dddc0b520baf25
pdf-font-stream PDF embedded font (sfnt) at offset 0x82DD 10100 bytes