Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f165b42341ea7de…

MALICIOUS

PDF

45.6 KB Created: 2020-08-06 00:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcb3c84981af1574f9a451632e40940e SHA-1: 755f761b74c04fcca9004500e84e620bac027ab2 SHA-256: 3f165b42341ea7de1b46f508387afb083c7268b6ccfa141474ea9f49b9dfb64c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at `ttraff.com`. The document body text, though partially corrupted, suggests a lure related to 'ignou assignment acknowledgement slip pdf download'. This indicates the document's primary purpose is to trick users into clicking malicious links, likely for phishing or malware distribution.

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=ignou+assignment+acknowledgement+slip+pdf+download
    • http://files.leahbealdesign.com/uploads/1/3/1/4/131407918/5286187.pdf
    • http://files.lesuerguitars.com/uploads/1/3/0/8/130814984/simutugemelizatedu.pdf
    • http://files.victorianchapel.com/uploads/1/3/1/3/131383541/c4b35e45d4baf7.pdf
    • http://files.fluxplay.co.uk/uploads/1/3/2/6/132682070/muvebufubuzo.pdf
    • http://files.borealisbiological.com/uploads/1/3/1/0/131070035/sasemobalate_xijobezaru_gemisato_fuwujarux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/gakugokisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/xopukaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/nibulafadexubarapofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/pefixuparimetabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/wamubuzuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/zomapajopew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9953/files/lindsay_lohan_nude_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/walamileson.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/australia_visa_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/sugadisesarosotewuziz.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073bd.bin
d783a5ca1b8186475f0f4af8f109a88e6fe336b071e37887120ce7e4641d876b
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BD 5472 bytes
font_01_sfnt_off0000866d.bin
845376bc57dbd942e51cefc23ed72b66a80a386ac411025c6f5333ee67a3f84f
pdf-font-stream PDF embedded font (sfnt) at offset 0x866D 10244 bytes