Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e7205a01e2c9ba…

MALICIOUS

PDF

47.6 KB Created: 2020-08-04 03:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c33389b8a1843b9ce0943eec08cd7b0b SHA-1: 8f9c38eedcbcd42988162776dfa55c453fb85bf7 SHA-256: 08e7205a01e2c9ba2f3367cf4e7fa82d6a9038b688d6443c69bab89d088e3a5e
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are flagged as malicious redirectors, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a textbook download and the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious infrastructure under the guise of providing a file download.

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/pify?keyword=principles+of+biochemistry+lehninger+pdf+download
    • http://files.greensavannahstables.com/uploads/1/3/1/8/131857782/3e2eebd0456db8.pdf
    • http://files.tylerdsmith.org/uploads/1/3/1/1/131163969/mitonizuja.pdf
    • http://files.offthechainrescueandoutreach.org/uploads/1/3/1/8/131871780/zegegiwupo-tapumad-mixapodiwogif-pebopopamagesu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/worupimoxigevudur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/papeteduvutoniziral.pdf
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/business_goals_2_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6685/files/wireshark_for_security_professionals.pdf
    • https://cdn.shopify.com/s/files/1/0439/8609/2190/files/pokemon_white_2_rom_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7138/files/14235463864.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/jivosikeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/2827/3569/files/60396584893.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/98331190419.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3151/files/nimeb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697f.bin
78252cf702812263ee6d7afbb6003e41b29a0f5aa817046f5f6900b0156d14fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 4416 bytes
font_01_sfnt_off00007913.bin
cce538330e6f897bd846ada92736ec11259436c495e5f8a341036e1231d2d8e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7913 5904 bytes
font_02_sfnt_off00008d13.bin
370009c4dc464518314b773af199cd4c1fc71288408655ecd5c08b0e7bd2174a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D13 10376 bytes

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