Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac8005fa2fde261…

MALICIOUS

PDF

44.1 KB Created: 2020-09-17 13:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3b7f362732f5139c8005acb0edd640b SHA-1: da342099cd20174533bf0e01910aab8a113454f6 SHA-256: 6ac8005fa2fde261ab00c6f89d9f8459f6d962e41778848f1194a20becc41ab6
154 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Avondale school district pay scale' and embeds numerous links, including a critical redirector to 'ttraff.club'. This infrastructure is indicative of phishing or malware distribution campaigns. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to malicious content.

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/wix?keyword=avondale+school+district+pay+scale
    • http://voworo.louisianagrainhistory.com/uploads/1/3/2/6/132681946/jowab.pdf
    • http://vapigupi.saintgregorysileby.org/uploads/1/3/1/3/131380934/kotebogisarisaf-folijoma-rojugizaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7fb6cd1b-a5da-4157-96ce-fee0bd567db0.filesusr.com/ugd/3ce946_f5cc8d278bb743c7b634ac9c8e9d6e16.pdf?index=true
    • https://ba44754d-92ae-46a2-be9e-2d534ab990d9.filesusr.com/ugd/c83fdb_14fe707f964e4124b8fa109dbcaaf301.pdf?index=true
    • https://828745b9-9f1f-4078-8fa6-a63eb3fe33d6.filesusr.com/ugd/234f58_fd7b476064564cba9c89c593fad06796.pdf?index=true
    • https://0c6eb7b9-9748-49e7-a757-cd6e0072dfba.filesusr.com/ugd/d6af85_fe606c4b7e7d4512adef94853cbf012c.pdf?index=true
    • https://5ebba418-9f05-44de-b97b-e8f44e147fd2.filesusr.com/ugd/d2cc1f_ce395aa4b2c7477aaf84f895905db8f4.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0462/3361/6533/files/tubiwexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8902/files/wixobuxufuvakatiku.pdf
    • https://cdn.shopify.com/s/files/1/0479/2860/6887/files/heavy_mageweave_bandage_learn.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/baghban_book_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9607/files/kumulepodevoragaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/tujepisugawuwigetixilizuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/31205717639.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/51928922764.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/gewejetakabuzegukova.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_off00006e09.bin
ef059506e1f65393bde16d71ad2c3ab00d77bec29e143f869b4efca0b9d26055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 5312 bytes
font_01_sfnt_off0000801d.bin
e1fac0fe54c64be18a7bef8502e208fc4d5f564d8fccf67d4a66a8dbba7476e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801D 10284 bytes

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