Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7139e60facdb342…

MALICIOUS

PDF

82.8 KB Created: 2020-08-21 12:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d59f9e5fa0d764b13ac19b2f2ab2d08c SHA-1: e4c6702aba1a388f2f1fdd3e85f0e99dce56ee8d SHA-256: f7139e60facdb342d78e3d0a6a6d64f11f53fe57ef7890a159e7fe445162cc5b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=induction+motor+control+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, but one on 'http://files.krisyforce.com/uploads/1/3/1/3/131384025/2944257.pdf' which is flagged as unknown reputation. The ML classifier strongly supports the malicious nature of this PDF.

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=induction+motor+control+pdf
    • http://files.krisyforce.com/uploads/1/3/1/3/131384025/2944257.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/1282656973.pdf
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/cantigas_de_santa_maria_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/chroma_key_footage_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/lumezovakex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/makazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/33945414262.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/jekorerotubavanuzididu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/54869639466.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/delis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/falixasugojux.pdf
    • https://cdn.shopify.com/s/files/1/0429/9168/1699/files/pilesisido.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63f.bin
9848c4f4280c2de716305f3138afc8d23c1cb61d8edcab586e3cc01fa660828b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 4612 bytes
font_01_sfnt_off0000e5c0.bin
da4c9a07a5e02fe66c83ba46b5adace386f8b50b646f83be4098742053e67c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 16964 bytes
font_02_sfnt_off00011b09.bin
bd0d8fc809c671ed665b9c14f7a517f3a9c47c82e6281d758a1e0018a6368dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B09 16212 bytes
font_03_sfnt_off00013031.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13031 4324 bytes

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