Malicious PDF — malware analysis report

Static analysis result for SHA-256 742f862832ce093d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-19 22:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b48390b2aa713636a7d55a87e0d497c3 SHA-1: 6703c6d383e2aac7de52406b2430405b8bc4ec2c SHA-256: 742f862832ce093de966a7134675b191340fb0b9ca7a0723e2a0e00260fd202f
194 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, pointing to 'https://ttraff.cc/pify?keyword=airtable+create+forms'. Another critical heuristic indicates a PDF link farm with 30 external links, many of which are likely malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests a business email compromise tactic aiming to trick recipients into changing payment details. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.cc/pify?keyword=airtable+create+forms
    • http://files.oszkayconstructioninc.com/uploads/1/3/1/4/131413766/7729ccc22.pdf
    • http://files.capturingculture-reighanfisher.com/uploads/1/3/1/6/131606789/db242.pdf
    • http://zorivevax.giantpawsgianthearts.com/uploads/1/3/2/6/132696030/18d3b.pdf
    • http://files.wilson-pto.com/uploads/1/3/2/7/132740399/36bae1df.pdf
    • http://files.treeofhopecounselingrochester.com/uploads/1/3/1/3/131383698/mibovo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1154/7036/files/rofobamiremefizaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/10959683833.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/zovegapuliwanutobakupup.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/because_he_lives_amen_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/57641396525.pdf
    • https://cdn.shopify.com/s/files/1/0440/4019/2150/files/evermore_alyson_noel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5643/0230/files/ackermans_van_haaren_annual_report_2016.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/kadifiminopor.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/wifukodonerakiwilafimumiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.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_off00007560.bin
5e9c193263d8ee2c49061caaaeac89d3d9e8c05def359f0bdfc020745596f80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7560 5156 bytes
font_01_sfnt_off000086cf.bin
463e8f1e588c120d668503a9e568a0dd6afe9900c42365f1df1d880b6f594fbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CF 9992 bytes

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