Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c73c7104d380334…

MALICIOUS

PDF

39.4 KB Created: 2020-09-06 01:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f394f9069c8327e8ba480417dbb434d SHA-1: e2662c2301b42715baa368ba8bea9d8a71c28932 SHA-256: 0c73c7104d380334067325bdd6dcc877061a6b281369721f0c81e5e465f953df
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, masquerading as a helpful template. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or phishing.

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.club/wix?keyword=excel+time+calculation+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cec570_f8398e484b78485da7bf8f913f64ec93.pdf
    • https://static.usrfiles.com/ugd/bb13a2_b2656a712adc43ab8fb7f0b317a8b34b.pdf
    • https://static.usrfiles.com/ugd/de3d83_272bca00af3440e5bb8027612fe3b879.pdf
    • https://static.usrfiles.com/ugd/50de67_57fa78d8ec82412ca7c960691ea5468a.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/yasuko_kawamura_face_lift_normal.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/td_corrig_d_atomistique.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/laws_of_indices_worksheet_ks3.pdf
    • https://cdn.shopify.com/s/files/1/0463/5285/9297/files/87519529606.pdf
    • https://cdn.shopify.com/s/files/1/0460/8691/4212/files/ziruwatekaluxuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7958/9283/files/lijobetuneduze.pdf
    • https://cdn.shopify.com/s/files/1/0470/9056/5278/files/features_of_absurd_theatre.pdf
    • https://static.usrfiles.com/ugd/ecec20_848df555fbc74f1a84b569f3864af0f3.pdf
    • https://static.usrfiles.com/ugd/2813e2_2711ed3589154c92834c8ff15404a8d7.pdf
    • https://static.usrfiles.com/ugd/c34aa9_65039fb9f0ec41ddb7fe70f5d1e5692c.pdf
    • https://static.usrfiles.com/ugd/834936_bab08c9a46e5427da0914d8f1b3e2f80.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_off00005dfd.bin
7841b2c677bd7bea224fed4023915c965c65d7f7689d867239ce544fd441edb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFD 4832 bytes
font_01_sfnt_off00006e63.bin
30e9a81dcfe5585b42c3a36f7cf4aa44d2ffaadc9faffb817518807db15a7095		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 10148 bytes

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