Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac1ad9856f09e0e…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 06:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbee98b28f0fe0e08aa645bdf318591d SHA-1: 2e5d9a9108640cb95f0eaa28ccfe30ac25de2109 SHA-256: 0ac1ad9856f09e0e81588004ce043696530957a2d3c827b39dc2680f835b9c8a
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure for an advance-fee scam, presenting itself as academic notes to encourage clicks on embedded links. The primary malicious link, https://ttraff.com/pify?keyword=bsc+agri+1st+sem+notes+pdf, is identified as a redirector to malicious infrastructure. Numerous other PDF links were also extracted, many pointing to potentially compromised Shopify domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bsc+agri+1st+sem+notes+pdf
    • http://files.alluringaffairs.net/uploads/1/3/1/4/131411688/8744432.pdf
    • http://files.ladybosproductions.com/uploads/1/3/1/8/131872079/9f7b3bc438d5b4.pdf
    • http://files.northwoodsgourmetgirl.com/uploads/1/3/1/4/131483138/mobakubetununiw.pdf
    • http://sirir.butlercleanersandlaundry.com/uploads/1/3/1/4/131482995/bikifodezi.pdf
    • http://files.shobukanjudohawaii.org/uploads/1/3/1/4/131482853/pajagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/33739241167.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/mulovag.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/trapdoor_minecraft_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9250/files/81662395265.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/4100662967.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/33493485408.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/antenna_and_wave_propagation_yadava.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/63016823374.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9066/files/epikur_hedonismus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/bawuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/zuxaxugumuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/amplitude_modulation_chapter.pdf
    • https://cdn.shopify.com/s/files/1/0434/9027/9574/files/tinasalagipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/14215603197.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ab.bin
a107a4194cb730e72c57d89ac543617c9f20fde5ae414b3a39d1c28f46fa2885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 5544 bytes
font_01_sfnt_off00007472.bin
792b61da296de39d159b83676f94f33d530e027efea463f1604e061b48d3a3f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7472 9936 bytes

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