Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a10b8e190d30978…

MALICIOUS

PDF

49.3 KB Created: 2020-08-05 16:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1946f14e3b3036ad6d76a19199d94caa SHA-1: ef0ab9b4fd21b2089bd29cfe3d32b20e789c1e1a SHA-256: 9a10b8e190d309784d60c1eef0337243edbcc6af0608a4287cec837b4df30664
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=risk+rating+matrix+pdf', which is also flagged as malicious. The presence of numerous links, many pointing to Shopify domains, suggests an attempt to create a link farm or distribute malicious content through seemingly benign platforms.

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=risk+rating+matrix+pdf
    • http://files.northstarclinic.ca/uploads/1/3/1/8/131856394/ef24bbbec5d7fbf.pdf
    • http://files.oliviabarryptyoga.com/uploads/1/3/2/6/132682790/2897152.pdf
    • http://files.oscarmoralesfotografia.com/uploads/1/3/0/9/130969428/3c0c5d1.pdf
    • http://files.reelresin.com/uploads/1/3/2/8/132814048/nojalabe_tisoj_gesov_kemowuvefeforo.pdf
    • http://files.fmbcyubacity.com/uploads/1/3/1/1/131164052/kugekosutofida.pdf
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/gazimokugebax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0722/9597/files/netbeans_ide_php_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/swtor_dromund_kaas_datacrons.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9538/files/wemodakupijiroramizuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1636/3927/files/84246457512.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/57094192150.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/mojikupijaviwululolid.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/901665423.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8172/files/critical_applied_linguistics.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/7332511360.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/rivumibufigirorisixe.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/himnario_cantos_espirituales_iglesia_de_cristo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/44683575563.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/38501609672.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/94040242564.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_off000081db.bin
9d6054914442d4ed804cd08f65249192115c719da73e9e3e0155d29878b38b6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DB 5468 bytes
font_01_sfnt_off0000946e.bin
fa5ff61636ddd9e4dc74654f1727e9b0a5eddc45a51b092f0d40fd859c79efd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x946E 10420 bytes

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