Malicious PDF — malware analysis report

Static analysis result for SHA-256 677bb60a9dfcd554…

MALICIOUS

PDF

32.4 KB Created: 2020-08-21 10:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c56d16c822a7820249ddde816512628 SHA-1: 2565d91759d64875c5015a469738be908fcb2a1e SHA-256: 677bb60a9dfcd5548af93ee2b90d4ae2d9cdb3ed7f2ec6f9ffd454934341545a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The document body, though partially corrupted, includes text related to movie ringtones and the malicious URL, suggesting a lure. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to host further 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.cc/pify?keyword=raghuvaran+btech+telugu+movie+ringtones+free
    • http://fofiwo.mymodernsolutions.ca/uploads/1/3/1/4/131438500/1206732.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/28755708459.pdf
    • https://cdn.shopify.com/s/files/1/0434/8120/2854/files/61830211164.pdf
    • https://cdn.shopify.com/s/files/1/0436/9406/3770/files/53596633906.pdf
    • https://cdn.shopify.com/s/files/1/0441/0041/9736/files/wujosavajitafisifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5468/5599/files/mevirowul.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/giluvotomiput.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/balanced_scorecard_and_performance_management.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/sampoorna_marathi_aarti_sangrah_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0465/0709/8262/files/ultrasound_guided_axillary_brachial_plexus_block_video.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/17077706664.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_off000041c2.bin
dd91d5a0bb525b5b3e87e2b4c9500c730f8fde6d0830a0b99228e4de99904c1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x41C2 5500 bytes
font_01_sfnt_off0000545b.bin
52e5b05388de62eddcb2190e2a2fc1573a62f120527730857e6bc64d539dce5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x545B 9544 bytes