Malicious PDF — malware analysis report

Static analysis result for SHA-256 c280b5318c4ffc81…

MALICIOUS

PDF

47.0 KB Created: 2020-08-04 07:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c967b8107bfafe2a8d0cc18a3b30f2 SHA-1: e06617abcc174e0a42ec5606441e98977b52d06c SHA-256: c280b5318c4ffc813c704334ce98e1c9231279842822b7715d580cff1085cd71
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=regrouper+deux+pdf+en+un+seul', which is flagged as malicious. The presence of a large number of links hosted on cdn.shopify.com suggests a link farm for SEO poisoning, likely intended to direct users to malicious sites.

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=regrouper+deux+pdf+en+un+seul
    • http://files.mymakeitfit.com/uploads/1/3/1/4/131453022/bixaxika_nuvikikijelobif_volavenobu.pdf
    • http://files.muphipvsouthbay.org/uploads/1/3/1/4/131408280/nagitonananate.pdf
    • http://files.velvetandtulle.com/uploads/1/3/1/4/131482864/dezejezutuxe.pdf
    • http://files.thecheshireclean.co.uk/uploads/1/3/1/6/131606165/5103445.pdf
    • http://files.cier-camp.com/uploads/1/3/1/1/131164350/fitixujagerow_xugado_pujomoromu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/robisunatonaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/vuwebunigawufuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44628440260.pdf
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/wubisizofuretamidakimozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/weronupajemidetixedojuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/79438751925.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/87784816998.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/warframe_status_effects.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/96203662281.pdf
    • https://cdn.shopify.com/s/files/1/0436/8026/8438/files/59799919415.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sutapazuvonovojikujabera.pdf
    • https://cdn.shopify.com/s/files/1/0437/8663/3374/files/ginugekinevitebabazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/48968145151.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/44740214772.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_off00007660.bin
f7ba16fc6d446a7ac180ad9bdb2a8fc6a5077ccb21e7fe5018611b76f26f130e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 5076 bytes
font_01_sfnt_off000087c7.bin
9a3e0cd082cda36380721f36e3f442047695e8f0d373d32cad065f06e4587825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C7 12724 bytes

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