Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be14b0c9fa2f521…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 06:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c4fc13f7550f4ddf85092abba62f631 SHA-1: c9943864faaa2157dfe41d4589f82e6a8e1dbcc3 SHA-256: 5be14b0c9fa2f521fb113a4b6ae7b9897543c2e450f75d57dbd80bf8c18170a3
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=maths+graph+paper+template'. Additionally, the document body contains numerous embedded URLs, many of which are benign Shopify links, but the primary malicious URL is clearly identified. The ML classifier also strongly indicated maliciousness. The overall pattern suggests a lure to a malicious site, likely for further exploitation or phishing.

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.ru/pify?keyword=maths+graph+paper+template
    • http://files.gamestorereddeer.com/uploads/1/3/2/6/132681617/zilon.pdf
    • http://vazogog.delislechiropractic.com/uploads/1/3/0/8/130814328/xipogoxulisobeg_zajofawupoki_bawuralono_valexidos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/multivariate_data_analysis_in_practice_esbensen.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/fmea_aiag_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/intentional_fallacy_text.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/fepokumurubaxima.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4211/files/disukesibemiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/free_song_careless_whisper_george_michael.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/gozimujidajuxazenutoxopes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/genofanigonutajet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/movimiento_rectilineo_uniformemente_retardado_wikipedia.pdf
    • https://cdn.shopify.com/s/files/1/0428/8839/6959/files/koranarenurutivosajop.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/59642769099.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_off000065af.bin
4c7506e42d9a4109e5c55d0888debf7f9d78b0a2a5d7985beb8bcdd019ec37b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 5240 bytes
font_01_sfnt_off00007761.bin
467d7c7e3acddf027621fb9fd309641d6c603a901d7e577e5d1b5ae4c306b6ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7761 10088 bytes