Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a05518ab9cd470…

MALICIOUS

PDF

45.2 KB Created: 2020-08-22 01:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa7c90f0e0ea931d8d1474b62a3795f9 SHA-1: 2f5060c1af833747cc6aa2b5fe6c13b93c0c5373 SHA-256: 82a05518ab9cd4709c96bfffedffcd1d29135d5fd941c0a0665ce9a9b1cdb300
194 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to suspicious or known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to harmful sites. The presence of a link to 'ttraff.cc' suggests a redirection to potentially malicious content, and the document body contains a similar URL, reinforcing the attack pattern.

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=vidmate+status+video
    • http://vamevil.tarpanpartners.com/uploads/1/3/0/7/130739274/dilojoxo.pdf
    • http://repexib.massillontigerinstructionalresources.com/uploads/1/3/1/3/131380429/rinetoretisirigubila.pdf
    • http://files.concordiaball.at/uploads/1/3/0/7/130739590/1446333.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0437/0215/7466/files/duronemafexugezezimadabe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3331/9831/files/appointment_letter_format_for_engineering_college.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/jafipaduburazonixut.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/popaladifesariz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/kemame.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/opossum_tracks_in_snow.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/vexakarul.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/duwilasaretutalinabegaxar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/sotovag.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2334/files/zededasetutoxisodijol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065df.bin
257a6c1bac89fbf5d4ad74c1c6b9af0cc75fd5d74050bf5d81994d49609504ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 4868 bytes
font_01_sfnt_off0000765e.bin
764cdbb9789893ece6db9c77d4374d7f3fcd592dc6c713a0df1be7bd3ef5d816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765E 10076 bytes
font_02_sfnt_off0000990c.bin
b69818e637cde1360e902dc7d3d453551f01227e033f2fd59ce6b303d43e6d5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990C 3400 bytes

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