Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e028698fb0dae1…

MALICIOUS

PDF

39.4 KB Created: 2020-08-31 09:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83ce87ff002947fe57a0d40c41397af SHA-1: 6000840f55ee79f58a9e2359e0e11ca32666fcc4 SHA-256: c2e028698fb0dae12289d8a1ce30a1d583016cfc2672021e9d81d599bde9db55
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a PDF link farm, suggesting an attempt to manipulate search engine results or distribute spam. The document body contains garbled text but includes the URL 'https://ttraff.cc/wix?keyword=mascarilla+simple+de+oxigeno', which is also flagged as a malicious redirector.

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.cc/wix?keyword=mascarilla+simple+de+oxigeno
    • https://static.usrfiles.com/ugd/0ebc1f_18cff1239a5d45d19b91aa1b44bb0f17.pdf
    • https://static.usrfiles.com/ugd/9dda13_9e2c8515c5e14d55be889caa89f1eaf1.pdf
    • https://static.usrfiles.com/ugd/47b1e8_b227bf4f38a54d2baa6ca1dee159be67.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_e93e5b32d12c46e588da73b867fe0bcb.pdf
    • https://static.usrfiles.com/ugd/2c8d66_53f5d25e31994720a2fe975d1e57655b.pdf
    • https://static.usrfiles.com/ugd/277b62_54162bbce91b4650a8ea30ef8a445c0b.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_46ac8c36df434d0190c455fa8aa39752.pdf
    • https://cdn.shopify.com/s/files/1/0435/0899/0116/files/amazing_grace_my_chains_are_gone_lyrics_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/8407/1583/files/misoxo.pdf
    • https://cdn.shopify.com/s/files/1/0457/6401/8332/files/top_army_mission_games_for_android.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_off00005c91.bin
62f66386d4f70df19097ffee0597bf71dc1e7dca8e9e9994024dac125636f21f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 5468 bytes
font_01_sfnt_off00006f19.bin
e58c3ac7701069c1e453906b3bd385ee64838c3b940c450fd957614faca946f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F19 10096 bytes

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