Malicious PDF — malware analysis report

Static analysis result for SHA-256 62edf978fd82f1f9…

MALICIOUS

PDF

39.1 KB Created: 2020-08-02 23:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b31d431387ff3c4fff0ef749f1de3fa3 SHA-1: 06f6e5bbbe22d5365087fa9debca8b3ba171879c SHA-256: 62edf978fd82f1f9fa3d478caab115fbd734d140ef668d8f2e055018b7634dda
154 Risk Score

Malware Insights

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

This PDF document contains a link disguised as a 'Colts logo png' that redirects to a malicious URL, ttraff.com. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting a potential SEO poisoning or spam campaign. The ML classifier strongly flagged this PDF as malicious.

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=colts+logo+png
    • http://files.pinupanddance.com/uploads/1/3/2/6/132695391/7877758.pdf
    • http://files.robertzant.co/uploads/1/3/2/7/132740978/42d70cadeaf1d.pdf
    • http://files.gzsartapalooza.com/uploads/1/3/0/8/130814124/pixifugif.pdf
    • http://files.dougscove.com/uploads/1/3/0/7/130739986/vafenimon_fewufiwa_babofesux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6726/9532/files/zemofebom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/42196481392.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8919/files/6265540973.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/64934754734.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/52520726601.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/10407464104.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5562/files/jetolaguzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/96931227622.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_off00005e55.bin
d5741e73befde059239118db1ef93d0d4363973806cb8d792ae91ea97095c7bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 4584 bytes
font_01_sfnt_off00006e0a.bin
7ee9f72703beab72f62b31cbbd6d9b9c3b21da95aac9eef540d134db73f16ae3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0A 9924 bytes