Malicious PDF — malware analysis report

Static analysis result for SHA-256 718a8b3e4205858c…

MALICIOUS

PDF

44.0 KB Created: 2020-07-28 05:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4276417a5e5caadd499eea555b6864cc SHA-1: 3fab2fe7828df77cb130e3b4284e30dcf1a9e5f8 SHA-256: 718a8b3e4205858cc72fa62b68004487b3af2b49a95a02dfac368757428c9575
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link directing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, 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=aws+serverless+template
    • http://files.transferoutpnes.com/uploads/1/3/1/1/131163687/womuxowogijewi_relixifiriruwif_kaxifubivatab_gasadikiveminaj.pdf
    • http://files.amrikbetty-coaching.co.uk/uploads/1/3/1/4/131452922/474ccc.pdf
    • http://files.lindalgraham.com/uploads/1/3/1/4/131455283/7d86161771d526.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0445/9170/files/1072559833.pdf
    • https://cdn.shopify.com/s/files/1/0436/9586/6024/files/buxugojeguxatebatenijurid.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/gaxenixizasanurex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depusulolunifanilux.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/48751455120.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/40748595749.pdf
    • https://cdn.shopify.com/s/files/1/0429/0363/4079/files/vulebiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/67862760002.pdf
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/xizemanigiwinije.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/javexotakepunijet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/bufoxonituzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/67819149881.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_off00007041.bin
d8e5a57440909dd46ce754876fe57836fc12ed4efe819135cbf2e1e2c155228f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7041 4628 bytes
font_01_sfnt_off00007ffe.bin
aaa63d4a0069972acc1688fdffb4991f3c430dd0defec3fd334cedc276147390
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFE 10176 bytes