Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d001a0bd7763607…

MALICIOUS

PDF

53.1 KB Created: 2020-08-09 20:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b37f8c9874b80e57bacdbdf78792df52 SHA-1: da9d0f20772ca592d1bf214ba2d5882857d51e46 SHA-256: 5d001a0bd77636075b9250525f745bcba00b163e1ac06a29e8d483aa5134a4a1
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for link farms and phishing campaigns. One of the primary links, 'https://ttraff.ru/pify?keyword=by+land+and+sea+march+pdf', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the title 'by land and sea march pdf' and the malicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=by+land+and+sea+march+pdf
    • http://files.fusionfightersdance.com/uploads/1/3/1/3/131383247/pezoxanasusupu.pdf
    • http://files.transgressivetheatre-opera.org/uploads/1/3/0/9/130969310/b804b749dc05c3b.pdf
    • http://files.sueannecelebrant.com/uploads/1/3/1/4/131437351/26ff42c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1536/5020/files/gegurakotadopenabas.pdf
    • https://cdn.shopify.com/s/files/1/0435/6512/1695/files/fegogojixobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45251784546.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/34302803676.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/63685490014.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/tamunoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/wedipikutajigum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/nijulisozifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/91574173234.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/fogedatamepolekifuxamug.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/lalitabon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079f6.bin
6591317b8e7f175c3f0ecc7a5f6eabf70ddcf691a9a77ff03992b5c255a614df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F6 5096 bytes
font_01_sfnt_off00008b16.bin
8af2400175af9927d7dde570586d3e816b98131d9a7406a9969a79de400bae56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B16 15096 bytes
font_02_sfnt_off0000b99f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB99F 4324 bytes

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