Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b352304bdd7ede…

MALICIOUS

PDF

45.4 KB Created: 2020-07-25 07:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d02d832cc6ae48af24793de8bca5f6 SHA-1: 370233471f7ce05ef33258be8305636b6dc0821b SHA-256: d2b352304bdd7ede19eebbf6dc61d4bb35fdde6691252c2ce2f9024fcb8fdd3f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is `https://ttraff.ru/pify?keyword=yasuo+aram+guide`, which is likely used to funnel users to malicious content. The document body, though heavily obfuscated, contains text related to a game guide, suggesting a lure to entice users to click the malicious links. The ML classifier also strongly indicated maliciousness.

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=yasuo+aram+guide
    • http://files.heartrealization.com/uploads/1/3/2/7/132712096/konokum_nuzipuka_lawafonud.pdf
    • http://files.professionalcapitalpartners.com/uploads/1/3/1/4/131438766/4121815.pdf
    • http://files.greenleafmissoula.com/uploads/1/3/1/4/131453006/e77a5ee4.pdf
    • http://files.donaldson7.com/uploads/1/3/1/0/131070792/zujomezu.pdf
    • http://files.donal
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/88089755558.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/19891604805.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/96848645941.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/navafolitekun.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/jareguvukuzeji.pdf
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/kamojikazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonexosorovofevovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/78441305532.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/60568498280.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/292603011.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/nozosudawuwuretuxiseteg.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_off000074ad.bin
00878789936cc158d333dd3a2bb4d4694206df874bc78c8d6034008e7d957f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AD 4768 bytes
font_01_sfnt_off000084d8.bin
dab803426fe639f350f0bd9413f88abd714a50e3fe4cd9fa207f916c9d9a2e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D8 10376 bytes

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