Malicious PDF — malware analysis report

Static analysis result for SHA-256 6076b22af211834e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 03:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b8c0468e3ebf43f0ff49c27e6ec5a08 SHA-1: 99792c64c5dc0e3477b4c2da130e834b216c2fc8 SHA-256: 6076b22af211834e0cdbd447f8d8de2e709569c0062a002c2844e3d64c47183a
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, ttraff.com. The document body, though partially garbled, includes text related to 'Fha income guidelines 2019' and a URL that appears to be part of a link farm designed to attract traffic. The presence of multiple external links, including one to a potentially malicious domain, strongly suggests an attempt to redirect users to harmful content.

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=fha+income+guidelines+2019
    • http://dikiv.prattindustriesboxesericstorm.com/uploads/1/3/1/6/131606174/7896683.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/5171/6503/files/aparato_respiratorio_anatomia_y_fisiologia.pdf
    • https://cdn.shopify.com/s/files/1/0429/1962/4870/files/pitufuxaxowinolarawaduxis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/atividades_de_alfabetizao_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/52197626665.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74731072541.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/goxazafoga.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/72354362377.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/40263125154.pdf
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/rational_function_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/potiniramupiropawot.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_off000065ee.bin
d2d9ad13dc11f622deef80811cfad9c07f886aff4e4cb45d9060bd490fe6f7b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x65EE 5696 bytes
font_01_sfnt_off0000791a.bin
5cd0c9698bbea8ccaf3c73e59708cb7ea2a53a2b2c3b2a4ba2006411c686ff92
pdf-font-stream PDF embedded font (sfnt) at offset 0x791A 10424 bytes