Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3866c9270a4abd5…

MALICIOUS

PDF

36.0 KB Created: 2020-08-27 15:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e203a365fb34380b1166a97f15626a0c SHA-1: 7567ef6b6beee6e6bf42cffa585a21d900c397d1 SHA-256: b3866c9270a4abd5e061df09e8f26bec3ed94d3c85eafa2582902053c634279e
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector, ttraff.cc. The document body, though partially corrupted, suggests a lure related to a "Body shop labor time guide". The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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.cc/pify?keyword=body+shop+labor+time+guide
    • http://giwadugo.mi6app.com/uploads/1/3/1/3/131398008/1481548.pdf
    • http://files.norsegodsasatru.net/uploads/1/3/0/7/130740249/wejezi-kozizawulalova.pdf
    • http://files.aextracts.com/uploads/1/3/2/6/132682076/musufiladewosas-xeratimidejafak-nebigum-siwalave.pdf
    • http://xeleride.eclectic-kids.com/uploads/1/3/0/7/130738956/jozarosekun.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/49370884158.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/oscar_wilde_salome_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/norixugurexejim.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/kesamasiteb.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/21190212568.pdf
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/budaya_jepang.pdf
    • https://cdn.shopify.com/s/files/1/0463/5692/2529/files/shiva_stotram_sounds_of_isha_mp3_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3384/4119/files/fafovinaxonuvofor.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/sportsline_stop_watch.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/wordly_wise_book_6_lesson_9_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/16973505673.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3929/files/21_day_fix_cardio_workout_cheat_sheet.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_off000052a9.bin
c369f333014dce34c845f4f9a9817f80ee1ca95d62fa0298bc8a7b478a7f1171		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A9 5664 bytes
font_01_sfnt_off000065d5.bin
418413bba93ee838c05c5f7ca82967fc5af1af5cabd0580f03acb98b35c12827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 8692 bytes

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