Malicious PDF — malware analysis report

Static analysis result for SHA-256 102857bd3e4bec80…

MALICIOUS

PDF

47.2 KB Created: 2020-08-15 14:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1e4e186899207ab709c87754733283 SHA-1: 9402800b0d3826eb236eaa26a59d54d60e6dc92b SHA-256: 102857bd3e4bec8006a92810ca2a1507b70ae068cf94dc786516194a3480dce3
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a critical 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 related to an installation guide. The presence of numerous external PDF links, many of which are benign Shopify links, suggests an attempt to obscure the malicious redirector among legitimate-looking content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=hortonworks+hdp+2.+6+installation+guide
    • http://files.jamesfarris.net/uploads/1/3/1/4/131437249/mujuruzozepa_tafenipon_pavofax.pdf
    • http://files.alexandriatalley.com/uploads/1/3/0/7/130740257/lixosilowilare_wolop_tuwosesipezisu.pdf
    • http://files.lscarpentry.com/uploads/1/3/1/1/131164250/7935492.pdf
    • http://xofoxez.rosewesche.com/uploads/1/3/0/9/130969343/1819399.pdf
    • http://files.dpsecurity.co.uk/uploads/1/3/0/7/130739081/8340b3a6c6105.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/the_bemba_kingdom.pdf
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/bsc_agriculture_entrance_exam_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/mamudovevem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/bogivasib.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/ciccarelli_psychology_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3144/files/ssc_steno_2020_question_paper_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5289/1298/files/polutaxadokawufofezin.pdf
    • https://cdn.shopify.com/s/files/1/0446/2968/8483/files/caballo_de_troya_3_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/pezid.pdf
    • https://cdn.shopify.com/s/files/1/0435/4349/4807/files/bssa_emblem_locations.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/rubesaxukufabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4823/9257/files/69605031769.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_off000070f1.bin
ff234c41fd547d986ea831a7fbe038246453d1ddbdff06916ff397a724e05de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 5656 bytes
font_01_sfnt_off00008445.bin
53d53cf988ea708250e8ee9e623464c51d8f42f5db26a66d9466479c14d90a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8445 13440 bytes

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