Malicious PDF — malware analysis report

Static analysis result for SHA-256 657acf39ebb3d437…

MALICIOUS

PDF

43.8 KB Created: 2020-08-09 07:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b5cae5f7eea42af759e0b603aa3aa49 SHA-1: 86b84a99962e5936efa1c291035d6afc6d9cc22d SHA-256: 657acf39ebb3d4371a0198a17303e0e214cd72eed5be1bdd547767595daa71fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword relevant to academic content. This suggests a phishing or scam attempt to redirect users to malicious infrastructure. The presence of numerous other links to Shopify-hosted PDFs indicates a potential link farm or SEO manipulation tactic to increase visibility and lure victims.

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.com/pify?keyword=halogenation+of+alkanes+pdf
    • http://files.gilliantorckler.com/uploads/1/3/0/8/130874629/gomenevidi-kinepowa-xasokipa-xupuzateseroji.pdf
    • http://files.jmhs68.com/uploads/1/3/2/3/132303315/tasulule.pdf
    • http://files.noorulhudaboutique.com/uploads/1/3/0/8/130813427/8638491.pdf
    • http://files.chickskicksboots.com/uploads/1/3/0/8/130874332/bamiwimimifip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/32501329288.pdf
    • https://cdn.shopify.com/s/files/1/0438/3693/2253/files/kezokatopi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3109/files/47328867914.pdf
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/sefazamunawofubapa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3742/3776/files/cnc_machine_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/toletidofebevisowezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/junugalojugasumimidok.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/malicious_sample_github.pdf
    • https://cdn.shopify.com/s/files/1/0437/1274/1529/files/vusoneborubolewategil.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/basic_chemistry_timberlake_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1205/files/kosul.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/seponajogapoxisejesusag.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_off00006d58.bin
bd917032f4c408777e65c0b0aedd5289437f5c24bb0ecb49652dc7f230ce6833
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D58 5140 bytes
font_01_sfnt_off00007ef2.bin
e407bb921c3d82de0d0af09146db1e59bd75541f540864f500df339651b028c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF2 10420 bytes