Malicious PDF — malware analysis report

Static analysis result for SHA-256 073703b2cf3367da…

MALICIOUS

PDF

52.6 KB Created: 2020-08-19 16:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2eada55f90d20167c82286d62ef550d SHA-1: bcabe663ff438f9b3780bfd901ca234577edf56f SHA-256: 073703b2cf3367da6937dbcb0be120ab030185710488b8ccf1a813b4287d2020
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One of the primary links, 'https://ttraff.com/pify?keyword=boss+me+80+s', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to direct users to potentially harmful content. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or redirection attack.

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=boss+me+80+s
    • http://favuza.wildelabben.com/uploads/1/3/2/6/132682883/xofakisid.pdf
    • http://gozef.aayogaandwellness.com/uploads/1/3/1/4/131454215/f86768f5ace2.pdf
    • http://files.belinktrans.info/uploads/1/3/1/4/131454984/libidigojosi.pdf
    • http://files.566westadams.com/uploads/1/3/1/8/131857540/764da.pdf
    • http://tozosafom.drjeannewilson.com/uploads/1/3/2/6/132682883/zurotegow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/metabolism_of_pesticides.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3580/files/83239648885.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/automorphic_forms_and_representations.pdf
    • https://cdn.shopify.com/s/files/1/0439/3798/8766/files/acuerdo_comercial_union_europea_ecuador.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/wapisetut.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/vorofepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/42799356730.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2633/files/likutabisadeniguzuna.pdf
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/marubuvimupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/antebellum_reform_movements_religion.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/bhimavaram_bullodu_full_movie_utorrent.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_off00008547.bin
a055b201f3579f56b15790139833b83eb5707c343e291143301704bc08ce32e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8547 4432 bytes
font_01_sfnt_off0000943c.bin
60f36b5a827b6fe27ae5fd00230d87f66a615c0c18db26dd67a0b1875ba2135b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x943C 10408 bytes
font_02_sfnt_off0000b7c3.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C3 4324 bytes

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