Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a9a09927e7c05c…

MALICIOUS

PDF

46.2 KB Created: 2020-09-04 05:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 322b6964495890f8f35628be6cf9985b SHA-1: fc3c768f5a877673e21f3f2b8e621aac6965ae85 SHA-256: 70a9a09927e7c05cd614ba37b7511a786a55bf72a679c1252191915f3a989d98
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.club/wix?keyword=anjali+movie+songs+tamil+free, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy. 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.club/wix?keyword=anjali+movie+songs+tamil+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/b8c837_91d29f0c93c547c0a93f18a9c21689ae.pdf
    • https://static.usrfiles.com/ugd/d6b5da_0dbe972e605b430bbcf89dc9daede6c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bcdf6cb6138444387f37b9c07b1e985.pdf
    • https://static.usrfiles.com/ugd/eed56f_0bd588f34c114b6da1433c0e8f43b642.pdf
    • https://static.usrfiles.com/ugd/3e5d97_3e793bea92e647c3b878e5b3ca8986a3.pdf
    • https://static.usrfiles.com/ugd/a18aa6_320f6671c4524c8aa6695265c6ea4efa.pdf
    • https://static.usrfiles.com/ugd/b8c837_edda605b7c2e48e6832091829f7ad355.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_b3010ff9aff44e4c87dd9d937a513532.pdf
    • https://static.usrfiles.com/ugd/628a76_f5b9ba92b91c44f48bd2f027e44d31e9.pdf
    • https://cdn.shopify.com/s/files/1/0449/3633/1419/files/rural_depopulation_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/kuxegipunexirema.pdf
    • https://cdn.shopify.com/s/files/1/0444/3288/3879/files/pononawadamifuwofi.pdf
    • https://cdn.shopify.com/s/files/1/0462/2693/1863/files/forbidden_lands_rpg_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0459/7494/5959/files/ambaji_mandir_information_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/28751799068.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2921/files/la_petite_ecole_bilingue.pdf
    • https://cdn.shopify.com/s/files/1/0428/3524/7271/files/vetuvadolokuxovuvabini.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/gojurerogogazus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/dizomekozaxu.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_off00005edc.bin
2e327295c9037b7f3c0a9ba9155f8cad04cebc6f0f2b0fee59dcf290c39f66fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDC 5212 bytes
font_01_sfnt_off0000708b.bin
c7baf07731db2f8fee5c70e7888f4277e901d6146c7bc87e120cd6261a067b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708B 3852 bytes
font_02_sfnt_off00007f4f.bin
95568186498a88ed34b6c407268f7411033d828c8e23a4f6af58beefffcd636f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4F 13416 bytes

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