Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b6d79a543369d4…

MALICIOUS

PDF

64.2 KB Created: 2020-08-07 18:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a860bbd6a1ebaa1408bae2b4e14d17f SHA-1: 1f047986207f3dcea6d99998ce7ba58938f2ed0d SHA-256: 03b6d79a543369d4ec2db4c130d2c4b0ff817112dfe3f9f346b68311c77a161c
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or scam attempt. The primary malicious URL identified is https://ttraff.cc/pify?keyword=business+analysis+valuation+using+financial+statements+5th+edition+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'powershell_here.pdf' and embedded URLs, suggesting an attempt to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=business+analysis+valuation+using+financial+statements+5th+edition+pdf
    • http://files.janeglennie.co.uk/uploads/1/3/1/3/131398224/25fc02a006842b.pdf
    • http://files.artlounge1.com/uploads/1/3/1/3/131398515/9b307cfc195cce.pdf
    • http://files.blakkanvas.studio/uploads/1/3/1/3/131381850/zokufepiladod.pdf
    • http://files.accoladeglobal.com/uploads/1/3/1/8/131871648/0300b22d.pdf
    • http://bosolovaf.karukeramining.net/uploads/1/3/1/0/131069839/c28caf839.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/41794010668.pdf
    • https://cdn.shopify.com/s/files/1/0445/5071/7604/files/open_powershell_here.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3105/files/java_person_class.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/zewopalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/86819567586.pdf
    • https://cdn.shopify.com/s/files/1/0437/3151/7605/files/7_days_to_die_mods_alpha_17.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/52772504420.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/wevako.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/mivitanuvegowos.pdf
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/alternating_current_circuits_corcoran_solution_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/48660512802.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/
    • https://cdn.shopify.com/s/files/1/0438/0
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bac9.bin
583ed388ea547338b576c6f31e44c1d3c3b0ab1362198e54be1731652b76359e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC9 5808 bytes
font_01_sfnt_off0000ce8d.bin
9c0b478757b95a1c14502741e479c5d0f6c7414dbcbccdc65911718ffdb0a694		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8D 10616 bytes

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