Malicious PDF — malware analysis report

Static analysis result for SHA-256 0697a6b20d1b18c2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 17:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d5d8f0c64ba3d8f4aab15be57019b12 SHA-1: f4f9d075e5436688445895d090e3a1f5d70f7640 SHA-256: 0697a6b20d1b18c288f24e3e2ee1b6fe5f0e190d65cd4f9c5c2bd9583f6d9200
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=atlantic+broadband+tv+guide+uniontown+pa', is identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Atlantic broadband tv guide'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector or distribute further payloads. 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=atlantic+broadband+tv+guide+uniontown+pa
    • http://files.skincarebyjacquie.com/uploads/1/3/0/9/130969545/e55037.pdf
    • http://files.elizabethmphillips.com/uploads/1/3/1/4/131409526/mirumabikizar-fewunimizuvi-pigel.pdf
    • http://files.image1st.org/uploads/1/3/1/4/131452922/0941cbbb3aa1cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/17553621516.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/35717348949.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/66807211546.pdf
    • https://cdn.shopify.com/s/files/1/0448/2826/2560/files/cambridge_multitracks_same_kind_of_life.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0431/8887/9521/files/kivakabufibetepidusuziso.pdf
    • https://cdn.shopify.com/s/files/1/0431/2868/4701/files/tibajufisevemizuko.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/57316888289.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_off00006863.bin
f076d6c4d8d34640e03315d3ad7bce77c91c8c29165f79a93c819e6c29f941a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6863 5344 bytes
font_01_sfnt_off00007aa6.bin
b329d334d8ebb26f7e360a94db07e7713f900b7f964a58b2d6a670c4d86d1e19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 10368 bytes