Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e0f5a12cdeb313…

MALICIOUS

PDF

45.0 KB Created: 2020-08-05 11:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168a088580ff31d8d9695696c081186c SHA-1: c7fa012eb89a90ba33c0968551e2910ed1e6ba78 SHA-256: 96e0f5a12cdeb3139ae65f6ee19215fe28548d165df661b832a842e8ef2feee7
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=current+trends+and+technologies+in+computer+science+pdf'. Another critical heuristic indicates a PDF link farm hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly supports the malicious verdict.

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=current+trends+and+technologies+in+computer+science+pdf
    • http://files.helpingyourself.net/uploads/1/3/2/6/132681536/nenunusix-kamugo-jegoz.pdf
    • http://files.eloisekerr.co.uk/uploads/1/3/1/4/131453267/5d9aaceb9a80df5.pdf
    • http://files.treehousesandstone.org/uploads/1/3/0/7/130775528/8c720b.pdf
    • http://files.lkelliott.com/uploads/1/3/2/7/132740511/5713e0.pdf
    • http://files.escaypeent.com/uploads/1/3/1/1/131164250/d87fa6c589b6.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupuxisupevijerabufogete.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/92615739909.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/82173608733.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/autocad_tutorial_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/6262/3394/files/pupurisogividolezojel.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/5285192696.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/5512906959.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/hotel_revenue_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/80874901764.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/59288671977.pdf
    • https://cdn.shopify.com/s/files/1/0438/1795/9586/files/pedagogy_of_biological_science_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/8531/4715/files/2017_jeep_compass_manual.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_off00007150.bin
a2edcc104b1db08af9d1d12167344e1974642c8bac44dd87e6e575886bc0ae94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7150 5476 bytes
font_01_sfnt_off000083c1.bin
4378d163de76e9f7b7c9abfa6b9bda68e54e37ab208ca1ff5c005c635a9baed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C1 10192 bytes

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