Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74e5d97462a8b96…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 09:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dd001e8e036bf4b66bf6651cfeb74d3 SHA-1: 55c4d693175f36e759f2bbf9b5eaf260a7cf05ff SHA-256: a74e5d97462a8b96db420533cb2d40860cf88cd87181702f268476c6b8b6c1df
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure to download content, which is a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=percy+jackson+e+a+batalha+do+labirinto+pdf+download
    • https://static.usrfiles.com/ugd/ae15ca_deb966f6442b474caa30642d2e0999df.pdf
    • https://static.usrfiles.com/ugd/74e905_abfdc29e688541eb9ef57b1fbcc305b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ed2aaded1c3425d813f5387c4679206.pdf
    • https://static.usrfiles.com/ugd/724bd4_96a024f5bc634b4eb0c73b84796afc44.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/best_comptia_cysa_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/webomobituwisumepepaxifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.pdf
    • https://cdn.shopify.com/s/files/1/0457/7525/7756/files/air_conditioning_service_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/python_find_in_string.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2303/files/auto_format_dialogue_box.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/xawamabodibuwegonot.pdf
    • https://cdn.shopify.com/s/files/1/0437/7667/1895/files/kindle_apple_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4665/files/basic_electronics_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/30715828322.pdf
    • https://cdn.shopify.com/s/files/1/0464/9549/8392/files/tasewexokotidonujewujavo.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_off000046af.bin
db8ca548f3f35650b7f45ce97c400225f0d7572e988b0d20d8d6698cf75c0ded
pdf-font-stream PDF embedded font (sfnt) at offset 0x46AF 5720 bytes
font_01_sfnt_off00005a27.bin
939753fb0dabf9ebbc6ff419136460b96e045435bab5455bb697c21461535f3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27 9608 bytes