Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bb4874d12fa4d6…

MALICIOUS

PDF

50.2 KB Created: 2020-08-19 15:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d69ad3c49bab025fb664379fdeefd5ed SHA-1: 7d620420651469b09bc6b110da312c7076529e1d SHA-256: d1bb4874d12fa4d686b3753ccfff5c4597a54ba73f237fd8f448d356029dd517
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a direct link to a known malicious redirector at `https://ttraff.ru/pify?keyword=kpi+template+google+docs`. The document body, though heavily obfuscated, contains text related to 'kpi template google docs', likely serving as a lure to entice users to click the malicious link. No scripts were extracted from this sample.

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=kpi+template+google+docs
    • http://files.arogueidea.com/uploads/1/3/0/7/130775870/xarakuwuxabenobug.pdf
    • http://files.valleywestphotographyclub.org/uploads/1/3/1/1/131163902/nifakuxufatikodaxux.pdf
    • http://files.prcvalleys.org/uploads/1/3/2/6/132682892/rojamileluzatutel.pdf
    • http://poletuz.alexandradeglise.com/uploads/1/3/1/1/131164456/681490.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/magi_the_kingdom_of_magic.pdf
    • https://cdn.shopify.com/s/files/1/0449/6569/1560/files/xorajiredonuzodozedega.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/upsc_sample_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/62103754367.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/intelligence_bureau_exams_2015.pdf
    • https://cdn.shopify.com/s/files/1/0454/8503/1576/files/89572099557.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/96713008998.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/zapirobunusexik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/functions_modeling_change_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3676/9437/files/mount_and_blade_warband_viking_conquest_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/jexodirudowudiwoberiwibez.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/github_clone_branch.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/67014858942.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/95201203445.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069c6.bin
e327d5cd5dd2059af98b490f53c027102b159c2976ce45a43d174b7e0767d27a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C6 5268 bytes
font_01_sfnt_off00007b93.bin
a4ce48ffccb6cf99d0a48031ca69a725c4ca319b851c8dfedb356e4078aedd0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B93 9792 bytes
font_02_sfnt_off00009752.bin
569d842bfd62e68530d685467366e0130ce02da32c1a50c9feb458fac42a620a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9752 10612 bytes

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