Malicious PDF — malware analysis report

Static analysis result for SHA-256 70944a570202fc84…

MALICIOUS

PDF

34.3 KB Created: 2020-08-24 02:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3d0a08b008be61145f06abfdaafdab7 SHA-1: 6b5704bd5881f4f8f4421ed86999979debbe5a7b SHA-256: 70944a570202fc84838385940a11762fb56701c3ba26e0bf9fc99c1c065a8360
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to sheet music. The presence of a malicious redirector and a large number of external links suggests an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.ru/pify?keyword=hoedown+from+rodeo+piano+sheet+music
    • http://files.youtharcheryacademy.net/uploads/1/3/0/8/130874631/8190777.pdf
    • http://files.thescea.org/uploads/1/3/2/6/132681891/bizedogubikaxa.pdf
    • http://luzar.gianatiempogallery.com/uploads/1/3/2/8/132814930/bazulo.pdf
    • http://files.saltedsanctuarysoap.com/uploads/1/3/1/8/131872269/jatanikos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/makewolix.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/51624252047.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/77104033626.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6659/files/12083557212.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/bowflex_xtreme_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/49821014328.pdf
    • https://cdn.shopify.com/s/files/1/0462/4842/7671/files/dobinugeboxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/congestive_heart_failure_treatment_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/82752364402.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/anaphylaxis_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0465/5097/4614/files/breathing_underwater_alex_flinn_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/notalate.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/52148916362.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_off00004830.bin
68017c8d1a225bdc5777293533cf0da32cf9dd9319e9c74018fea313539ff9e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4830 5416 bytes
font_01_sfnt_off00005a7a.bin
091048907f137ce01903d5a6afddaf1c9ef3dee10f227b93d0e025e209f2ea36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7A 9848 bytes

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