Malicious PDF — malware analysis report

Static analysis result for SHA-256 084f0bcdc9fc7daf…

MALICIOUS

PDF

42.7 KB Created: 2020-08-14 15:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d7f1f8d3de086500418fb634c34f650 SHA-1: e9a8396513fd10ebbd8f412b1ad98544a1d3d68f SHA-256: 084f0bcdc9fc7dafbd5a58d543f28917a9ce7c3af881da2bb1a219a1a6a4476e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which are algorithmically generated and point to a link farm, indicating a SEO poisoning or redirection attempt. The primary malicious redirector link is https://ttraff.cc/pify?keyword=resume+template+office+2010, which likely leads to a second-stage payload. The document body, though partially corrupted, suggests a lure related to 'resume template office 2010'.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=resume+template+office+2010
    • http://tufutisij.okmulgee7.com/uploads/1/3/1/6/131606066/wepebiwu.pdf
    • http://files.californiaconservationoftrails.org/uploads/1/3/0/7/130738779/f485c81bcd8.pdf
    • http://files.hersheyblazetc.org/uploads/1/3/0/7/130738641/dinewosorajo-dudoxetaba-gadadadob-dewopik.pdf
    • http://files.zndaughtersdance.com/uploads/1/3/1/0/131069781/dc19de7df.pdf
    • http://vaxok.international-mini-mba.com/uploads/1/3/1/6/131606577/vutekok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/cholesterol_metabolism_pathway.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/converting_among_metric_units_worksheet_answers_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/luburilukobuxafegi.pdf
    • https://cdn.shopify.com/s/files/1/0447/4427/8170/files/mazal.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/99704213383.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1308/files/90314817308.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/free_weighted_decision_matrix_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/32810162389.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/confidential_fax_cover_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/63944432676.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/9919889828.pdf
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/92128417030.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_off00006a9e.bin
fc3f19ffeeee2a9436fbe183d2ba23f14bae61c098d8662989bedeecc2f4a8b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 5400 bytes
font_01_sfnt_off00007cf0.bin
843386bac85bb9bed817949643a15a8e3136a49f7a4f733050a9be164669e7ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF0 9696 bytes

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