Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ebfa9554f57b68…

MALICIOUS

PDF

50.9 KB Created: 2020-09-06 03:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f598edaea6351bf9b11438b3fd810258 SHA-1: d4a7430dde42945a37b3662cb5203e8589238d06 SHA-256: 75ebfa9554f57b687ac21e31342734dbecbb394ddf474fdc9ac5fc40f2e9fca1
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be a lure for information about asthma. This URL redirects to 'ttraff.com', which is flagged as malicious. The PDF also contains a large number of external links, many of which are benign, but the primary malicious link is the most concerning.

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=asma+causas+sintomas+y+tratamiento+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/590778_871d7ce7c30c45a791e5b55b27da97d1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dfc587d6c35a4f17877ed0369fc95c21.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/02631b_aa91eee9261b44c4b61295115c159be8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b5472a_ffc2feee5c5c4f31b81b824accba72bb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2841/4363/files/caligula_1979_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9531/7911/files/4430298253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/95890970764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/sefetorufijarupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/rivabinovalujajuxis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/lowrance_hds_9_gen_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/46998521947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/36564894267.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D3 5244 bytes
SHA-256: fefa390b1034362ee184df9ebaf908ec4b4fa4391ddfa5e6e993fcb621d2db85
font_01_sfnt_off00008b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8B 10692 bytes
SHA-256: 80f27bca9ddd2f5599a6c771f702988eb83705aec066f56f114b1622ab10f44a
font_02_sfnt_off0000ae6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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