Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a1d066cac8ac62…

MALICIOUS

PDF

42.2 KB Created: 2020-08-24 16:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51522c6c9317f7a984971c1077be5df0 SHA-1: 49536ae83aea24556ece0e28a90abaa3f1e5dab0 SHA-256: 88a1d066cac8ac62449a387ef035a7f15d947e529f0a6594bfaa9c81f4503d41
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector (https://ttraff.cc/pify?keyword=crib+sheet+define). The heuristic firings indicate this PDF is designed as a link farm, likely to direct users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through redirection, potentially 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.cc/pify?keyword=crib+sheet+define
    • http://zigupenov.folkestonechoralsociety.org/uploads/1/3/1/3/131379803/9066935.pdf
    • http://files.alwaystherepetcare.com/uploads/1/3/1/4/131406893/52148c99f57.pdf
    • http://files.sclapparel.com/uploads/1/3/1/4/131438641/zinekuxitonor.pdf
    • http://files.inverlochhomecrew.com/uploads/1/3/1/4/131437276/kawafibuxir_rojilesaguxuro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/52350947902.pdf
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/dugamos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/41977058033.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/89759495942.pdf
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/strategy_under_uncertainty_harvard_business_review.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/59435308464.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/34964179560.pdf
    • https://cdn.shopify.com/s/files/1/0454/2604/9182/files/fusionner_mac_sierra.pdf
    • https://cdn.shopify.com/s/files/1/0440/7525/3910/files/80729099787.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/biwijebafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/tosekinusigagut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/fundamentals_of_organic_chemistry_john_mcmurry.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/25703175259.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_off0000677c.bin
b3ee4fcca34a09ce9183e263b305f6f01657dcb6c990166b8695707d7eac9450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 4796 bytes
font_01_sfnt_off000077c2.bin
009774ad5a3eeb77d48c1179ecee835ad43daaa6d47536567740a7f99d68fe0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C2 10524 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.