Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe501653acdcd3c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-22 11:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9212b170e27da01ffee59dc1b343370 SHA-1: c55ee22a075d2d8f47c4c949a5b68dd9c89e5db7 SHA-256: bbe501653acdcd3c5cc2208462eb0e465ca5838a24857c9893e52fd5253c310f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a weather report and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to shopify.com, likely to obscure the malicious redirector.

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=weather+report+delhi+next+15+days
    • http://magazo.jvcai.org/uploads/1/3/1/4/131438500/f948f638.pdf
    • http://leresen.1stumcstudentministries.org/uploads/1/3/1/4/131483281/nufevowuje_zipiwivadibezum_gatesesesos_lepuk.pdf
    • http://files.fccira.org/uploads/1/3/1/3/131381109/cd5b0ee13498c.pdf
    • http://giderof.royglobalized.org/uploads/1/3/1/3/131398560/zikafu.pdf
    • http://mamerax.achievepersonalwellness.me/uploads/1/3/0/7/130738554/xanenipotijare.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/weather_report_in_english_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/best_online_editor_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8976/files/16967450371.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufowotipopugisafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/mibexezuralebijadijoda.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/ldc_result_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/23004277781.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/93537021512.pdf
    • https://cdn.shopify.com/s/files/1/0437/7824/4765/files/tcs_ninja_aptitude_questions_and_answers_with_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/kokovem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/24490809042.pdf
    • https://cdn.shopify.com/s/files/1/0438/9548/8680/files/77594032802.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c22.bin
5418589d0891f7bcc78b0cbc10cd7392254e90246b9e4a7123f7829627dadebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C22 5404 bytes
font_01_sfnt_off00006e9b.bin
f73cb202b1253c13bad850b0be48a8a161d7e2e5e7a91246ce7a9322047e75b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 13696 bytes

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