Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec014bdc5aa200ce…

MALICIOUS

PDF

80.7 KB Created: 2020-10-21 05:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55601421e276693e196c7bae480197b1 SHA-1: 28efca63873d14e0da581061f7635051de082719 SHA-256: ec014bdc5aa200ce5a8ab937a76552bd81b4552858bc685f208d3969cc632e02
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to cosmetic product instructions. The PDF also contains a large number of embedded links, many pointing to S3 buckets, which is indicative of a link farm or SEO poisoning technique. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of malicious intent.

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/123?keyword=equate+beauty+xtreme+whitening+wraps+instructions
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/nemamaliz.pdf
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/visuxiwelibu.pdf
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/tifatizep_bejuj_legaw_zutezivulis.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdf
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/depuninibakeza-xuzekaloro.pdf
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f880bd1818d0.pdf
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f8e7447a54e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sugaguxagu/towemeraloxid.pdf
    • https://s3.amazonaws.com/kavitokolezub/44840004912.pdf
    • https://s3.amazonaws.com/susopuzupure/lolidupetidonogixokiki.pdf
    • https://s3.amazonaws.com/jamokaroxoj/physiology_practical_manual_book.pdf
    • https://s3.amazonaws.com/subud/ferujonebuxasufe.pdf
    • https://cdn.shopify.com/s/files/1/0486/0536/4392/files/58081482913.pdf
    • https://cdn.shopify.com/s/files/1/0499/4990/0990/files/epsxe_android_1.9.0_apk.pdf
    • https://cdn.shopify.com/s/files/1/0496/7451/8691/files/94088396918.pdf
    • https://s3.amazonaws.com/tetazino/35681815859.pdf
    • https://s3.amazonaws.com/kavitokolezub/portuguese_to_english_learning_books.pdf
    • https://s3.amazonaws.com/susopuzupure/jusavajeluwizogesez.pdf
    • https://s3.amazonaws.com/leguvefu/1501112858.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_off0000ef76.bin
c5f28dec6dd0a019fc541dad89563f67f31e3621ffbdac807e00a06897fbb62e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF76 5684 bytes
font_01_sfnt_off000102b8.bin
d079793a1414d2075b053de1a92dabbf1676659c3890c48f209023454f5e3374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 10388 bytes
font_02_sfnt_off00012628.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12628 4324 bytes

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