Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad8a2b60102bedb…

MALICIOUS

PDF

46.8 KB Created: 2020-08-28 03:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 575a471a162303cc13191af57bba2d06 SHA-1: ebc06bac77a8628461e79641d238e57e449c5108 SHA-256: 7ad8a2b60102bedb3cd9d136d6aac720389b0e0b10211ed20846b3a4f7e82366
154 Risk Score

Malware Insights

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

The PDF contains numerous links, masquerading as a manual, that point to a redirector service known for malicious activity. The ML classifier strongly indicates malicious intent. The document body itself is heavily obfuscated but contains a URL that appears to be part of the malicious infrastructure.

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.cc/pify?keyword=craftsman+190cc+lawn+mower+manual
    • http://mekanij.stephaniesmithshowdogleads.com/uploads/1/3/1/3/131383613/lipofivebesapiz-tiduvifesuzafa-lokudol-zobesitaripira.pdf
    • http://bujusos.mordenservicesforseniors.ca/uploads/1/3/0/9/130969192/2968192.pdf
    • http://files.sudburyhousing.org/uploads/1/3/0/8/130873908/geposovizuneke_wibezeladezivo_repifusi_paxel.pdf
    • http://files.rebeccakellyonline.com/uploads/1/3/1/3/131398504/2119302.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/79551714205.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/nitifurowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/fixebilesig.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/52760927546.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/airmen_result_02_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/65834988525.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/jutinirinevosipibobujig.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9445/files/numoguxazivizilivax.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/mihail_bakunin_kitaplar.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/xozutigeboxikigikike.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/wibutosewarokobok.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_off0000783c.bin
78250d4aea61d967749834738f21c120011c40d4cd3ad0726a0412b01aeba7c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x783C 5376 bytes
font_01_sfnt_off00008a7a.bin
5b500496a7423071be22345a7dd0666ef6b346b335365c6cbaa4c9e24b7268ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7A 10440 bytes