Malicious PDF — malware analysis report

Static analysis result for SHA-256 07daa0f79c034dad…

MALICIOUS

PDF

35.6 KB Created: 2020-08-19 05:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f043818f92c973fa8ed4b92659589d43 SHA-1: c8446d733c72ddbbca46f7e635564ca6d4c81b02 SHA-256: 07daa0f79c034dad74e34009b5becc1475312303d9b9b92a33f4241bd2a01c4b
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a reference to 'Asio link pro' and the malicious URL. The presence of a link farm suggests an attempt to distribute malicious content or manipulate search engine results.

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=asio+link+pro
    • http://files.wereready.org/uploads/1/3/0/8/130874328/3062434b.pdf
    • http://files.velvetmilitia.com/uploads/1/3/1/4/131406222/ziwuponerupug-rusolipobenova.pdf
    • http://files.karlapamanes.com/uploads/1/3/1/8/131872178/gikaju_vudaxolunaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/android_auto_compatible_cars_2015.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/92539078729.pdf
    • https://cdn.shopify.com/s/files/1/0435/9477/6739/files/algebra_1_glencoe_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/73487654671.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2275/files/literacy_narrative_essay.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/lirorafibipolamimidini.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/95690020754.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/44047422610.pdf
    • https://cdn.shopify.com/s/files/1/0435/7632/8355/files/senufalixabidinejopubuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/90834419737.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_off000048ec.bin
ceb5b996696a7e4e4613454da85ebc932e2454587110ae2c2fac9efd47948b33
pdf-font-stream PDF embedded font (sfnt) at offset 0x48EC 4656 bytes
font_01_sfnt_off000058cb.bin
223ee218d07bf53804033a35e6ff5d0c3c06d9797abe33896a127fd4588e8c5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x58CB 13016 bytes