Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b636e1ababdd5a2…

MALICIOUS

PDF

51.4 KB Created: 2020-09-10 16:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0a218dfd3c84f7ccd29cd2a45af11d7 SHA-1: 00154dbeb2dab2d4505bc4f96b9337dcb384c3f9 SHA-256: 7b636e1ababdd5a2707aea7bdd0c0fd73cb43e624e4f5034f94130d88d4daa29
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a prominent link to 'ttraff.link' which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to drive traffic to potentially harmful content. No scripts were extracted, but the presence of multiple PDF links and a malicious redirector indicates a likely phishing or malware distribution attempt.

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.link/wix?keyword=android+one+2019+indonesia
    • http://rikewoxot.sheldonbryant.com/uploads/1/3/1/3/131379179/bixegimud.pdf
    • http://vosik.dancevibessf.com/uploads/1/3/2/6/132681504/4d1aadb07a1.pdf
    • http://files.acsunrise.org/uploads/1/3/2/6/132682758/dugonali.pdf
    • http://zedunidak.erspamermusic.com/uploads/1/3/2/7/132741073/03339da.pdf
    • http://mobavodu.tualatindar.org/uploads/1/3/2/7/132740594/lutedopatarono_majar_mafadiwav.pdf
    • http://parisudop.securevisionmediasolutions.com/uploads/1/3/2/6/132680835/rufavanav.pdf
    • http://files.spotonseamus.info/uploads/1/3/2/6/132681494/2751445.pdf
    • http://files.idajaneeyelashextensions.com/uploads/1/3/0/7/130739906/topuziture.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/5338/3581/files/video_marriage_not_dating_sub_indo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/73102494519.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/toluvimujil.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/bang_bang_all_song_ming.pdf
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/libros_apocrifos_del_antiguo_testamento.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/metabolismo_de_proteinas_bioquimica.pdf
    • https://cdn.shopify.com/s/files/1/0432/7997/4556/files/kuriv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/manpower_mobilization_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/arsene_lupin_livre.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008983.bin
5a931a910692b9aab15df145867e68242da9dd00e0069c52e7ffb9a126ef8594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8983 5260 bytes
font_01_sfnt_off00009b6c.bin
12d7d9bee778e080bde03484176d37dbb9c46b1101b479cb78eb174f57665a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6C 10948 bytes

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