Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37df47ea8817731…

MALICIOUS

PDF

47.6 KB Created: 2020-08-04 18:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f7d9994d4e5430531f14553b0634fe6 SHA-1: 18fe8a33a40c2b6e517ad2ca892ceec4dac5362b SHA-256: e37df47ea88177314dc1b2244fd6a916ad16c2b653bb70f05bbdb0a582a16d4f
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 one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=fundamentals+of+python+first+programs+kenneth+lambert+pdf'. This suggests the document's primary purpose is to lure users into clicking malicious links, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=fundamentals+of+python+first+programs+kenneth+lambert+pdf
    • http://files.stackingstonesministry.com/uploads/1/3/1/4/131406104/mejewi_najukuruv.pdf
    • http://files.alliancecd.org/uploads/1/3/1/3/131398419/guseguj_zixoruramudixu_marupurigozofo.pdf
    • http://files.countrycharmflorist.com/uploads/1/3/0/9/130968984/1983710.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/palaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/74100523935.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/1447982542.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/92098527037.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/55485500410.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/pomejamebipajediwonas.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/is_sirhurt_better_than_synapse.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/videvizerixotajijero.pdf
    • https://cdn.shopify.com/s/files/1/0428/4511/0438/files/sofilepegumozeroro.pdf
    • https://cdn.shopify.com/s/files/1/0443/3536/6300/files/oxigenoterapia_enfermagem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/8525506080.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045d9.bin
85818dd03aa3c37ec478f53ed4b2d50691715cd00bc09c1093c766e00c0d1ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45D9 3932 bytes
font_01_sfnt_off000053c2.bin
6589b13cf7116cd050bc7e752dad43448eda083d6498ffa6d7486ebfc634242d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C2 5600 bytes
font_02_sfnt_off000066a3.bin
65ee8ae4a17781b677f67cc26ec79741466f8206a6dd0a3dbfd346be11760710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A3 9776 bytes
font_03_sfnt_off00008829.bin
dd19fa09195845c11a619fb55e363536dfa53426a1a88a25a50c521ccc631ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8829 17120 bytes
font_04_sfnt_off0000a043.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA043 4324 bytes

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