Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e448541c576b09…

MALICIOUS

PDF

40.9 KB Created: 2020-08-28 14:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71243952b22093ad3af2e5fa0564fe8f SHA-1: 473aa2c5201dbd15ca61ca094ac9471ab99bdf03 SHA-256: 06e448541c576b09d2d1e518ce3d0bebb02527b479227d37222749571ffec543
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a redirector service, which is a common tactic for distributing malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm or redirection scheme. The document body, though partially corrupted, contains a URL that appears to be the primary malicious payload delivery mechanism.

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.cc/pify?keyword=effect+of+germination+on+pea+seed+respiration
    • http://koriwudi.abellcable.com/uploads/1/3/2/8/132815806/4180883.pdf
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdf
    • http://files.muddyriver.org/uploads/1/3/2/7/132712326/kakamoxesidawawa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8562/5499/files/91071281500.pdf
    • https://cdn.shopify.com/s/files/1/0438/4364/9698/files/mavuxiriral.pdf
    • https://cdn.shopify.com/s/files/1/0462/6520/4893/files/mefix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5289/files/77415247935.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/59645578411.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/story_of_christianity_volume_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/zixesaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/rabijup.pdf
    • https://cdn.shopify.com/s/files/1/0436/3082/1529/files/41750692415.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/introduction_to_biological_anthropology_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/pokamapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/37809608669.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057d0.bin
f56db0c7de8868d9b8c1668e95d759e16e25d37c66d2a4b4fb799095701799fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D0 5400 bytes
font_01_sfnt_off00006a15.bin
4d2bd9802150edee1710ababb9987a8d145d9cc4f8bce57d1a0f2f3ed28f6159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A15 14148 bytes

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