Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b10bab12ae8a78…

MALICIOUS

PDF

42.0 KB Created: 2020-08-09 16:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17e273baadfa7644b83871f10ab1b775 SHA-1: 7bea14b7c4e954c7843ab8feab387869cb345144 SHA-256: e9b10bab12ae8a7847d9aaf763556d2acc082101ff22b6d6528ea83eefcff4de
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a link farm or SEO poisoning tactic to lure victims. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=basketball+player+positions+pdf, indicating the lure is related to basketball player positions. The ML classifier strongly flagged this PDF as malicious.

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=basketball+player+positions+pdf
    • http://files.ravishedbyhisbeauty.com/uploads/1/3/1/4/131438418/reragolamevet-vugufirudulegek.pdf
    • http://files.katiamoorsdesigns.com/uploads/1/3/1/3/131379680/1513243.pdf
    • http://reril.empirephilippines.com/uploads/1/3/2/7/132712207/lifetotejupe.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/juded.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/air_pollution_control_equipment_calculations.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/vosepejopawasobefil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/mutaxelanedidazumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/pusuwoxuxerurawesekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/61313510241.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/fomewadazolopemo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/25410424536.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/gukisopadazoguf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/bexobisedetop.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/mexadumidonafus.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/93684292864.pdf
    • https://cdn.shopify.com/s/files/1/0428/9878/4422/files/69732584151.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_off000064e4.bin
763390b55ccf6585696e157434d34d5aa962a065138bcb9f0e2f6051c209ae0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 5392 bytes
font_01_sfnt_off0000774b.bin
0734ca09e6ad884442a701438efdf5fd3cf192ec137d8bef274e9cc03f0a706c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 10536 bytes

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