Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f2dde8b39e6e83…

MALICIOUS

PDF

36.2 KB Created: 2020-08-14 02:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2742962ddae2ff3c44c87047a610ecc SHA-1: 45d35073d29dd5bf22c3aa2d4b2551c513c6ebd4 SHA-256: b0f2dde8b39e6e83cf16f2bf64548d05a8a7978dbeb264f0884353b13cc797b4
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=modhubala+bagania+video+song'. Additionally, it contains a link farm with numerous external PDF links, many hosted on Shopify domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL and several other PDF links, reinforcing the link farm and redirection attack pattern.

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=modhubala+bagania+video+song
    • http://wixifimew.getfitz4life.com/uploads/1/3/0/8/130873995/fozirogotek_xezoporo_debowuno_sisan.pdf
    • http://files.whitewardrobe.net/uploads/1/3/1/4/131437532/2516262.pdf
    • http://files.bodybycookie.com/uploads/1/3/2/3/132303382/momojotuwirikudasib.pdf
    • http://febus.semohpalumni.org/uploads/1/3/1/4/131453247/potirunepinudap_vajexujamofov.pdf
    • http://files.chelseanoellephotos.com/uploads/1/3/2/6/132681378/sofus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/62213626929.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38138836364.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/66159776113.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/zadujetemixufakeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/32267451683.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/55856026675.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/whatsapp_business_app_for_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44758106853.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/wigopazuvumego.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000437d.bin
fe35e3192de1a90224697d38bb012e1ebeb4b64c2ac84abf60c3e8aa782d6973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x437D 5000 bytes
font_01_sfnt_off00005472.bin
bdbb929e22a2734b7f48465ba00620d4bf17b0d643f37184b9546dea6322cba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5472 9776 bytes
font_02_sfnt_off000075f6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F6 4324 bytes

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