Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6deefeff53e7171…

MALICIOUS

PDF

34.3 KB Created: 2020-08-16 22:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0704cfa357d913ccf7d9f50b61716b6 SHA-1: cf48b2e2e82ba032c764e86791f1e12165970cff SHA-256: d6deefeff53e7171f106324288fecea60d051ae8c5aba3ee2c03952755fcb73d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Les miserables stars sheet music pdf' and the wkhtmltopdf tool, likely serving as a lure. The primary malicious URL, https://ttraff.com/pify?keyword=les+miserables+stars+sheet+music+pdf, is designed to redirect users to further malicious 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.com/pify?keyword=les+miserables+stars+sheet+music+pdf
    • http://romofuwov.hayleywhitehealing.com/uploads/1/3/1/3/131378950/xowepimirep.pdf
    • http://vetosavo.nordiclilly.com/uploads/1/3/0/9/130969723/3495386.pdf
    • http://tezexugaw.michiganburgerboys.com/uploads/1/3/2/8/132814050/4218114.pdf
    • http://files.youngbrothersacademy.org/uploads/1/3/0/9/130969065/dobunodatato-bexagegemasabom-sowavunago.pdf
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/plant_hybridization.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/nuwozadomekejasitu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/mogoxetetunazobivi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/76572501296.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/51389487612.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/demuwepenujuvi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/mukowefozunob.pdf
    • https://cdn.shopify.com/s/files/1/0452/8783/3762/files/befozoru.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/28896527311.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/45328954122.pdf
    • https://cdn.shopify.com/s/files/1/0433/4341/3407/files/87158850276.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/fotirizisejimuwubenit.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/4892386287.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_off00004a16.bin
ac1ed5f7f03cb25430a6bedd3276e8bab23191865b1dabd16d1cc2424a101a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A16 5476 bytes
font_01_sfnt_off00005c80.bin
354f579347582a6fa778a6fdb12bb3a5b3fac60735680cb721913b20102a4467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 9348 bytes

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