Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bf4dc1b48e607e…

MALICIOUS

PDF

50.8 KB Created: 2020-08-01 08:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e80399ef4e8429c5c86ae54fcdb6af05 SHA-1: daa6c9545a1179718dca60842b39cf7b532ca1bf SHA-256: 29bf4dc1b48e607edc1ac6b41489101e2fa7249339854bb4655398c96d904540
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the text '5x5 sliding puzzle solver' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and visibility for the 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.com/pify?keyword=5x5+sliding+puzzle+solver
    • http://files.alpsed.org/uploads/1/3/0/7/130776003/dagivigof.pdf
    • http://files.norstarindustries.ca/uploads/1/3/2/7/132710565/6924308.pdf
    • http://files.soulfoodstudios.org/uploads/1/3/1/6/131637218/6067227.pdf
    • http://files.nativenerds.org/uploads/1/3/1/3/131384070/zatet-gewuvovelepalod.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/46214121305.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/kigoduzifogedowopegal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/mogumitifugexenolinowelu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/vozurufovarupavesipad.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/bemokibemulozovabenun.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0838/files/lux_1500_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/mojepuzuzapurupajixil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/poweramp_music_player_trial.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/79656769530.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/potajezezelof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/58327252801.pdf
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/8202975959.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007332.bin
9f18c08d7263850ea20013aad3c175bf4ee65e19d7cfa6b349d8497a629806f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7332 4924 bytes
font_01_sfnt_off000083f5.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F5 1800 bytes
font_02_sfnt_off00008c83.bin
1ad3ce37b72671ef451a6d9e7b0e59d28eb5acd8411cf2f813aa2c91afe58d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 10120 bytes
font_03_sfnt_off0000af2f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2F 4324 bytes

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