Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da516c280a6776b…

MALICIOUS

PDF

84.2 KB Created: 2020-08-11 19:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd9938b10895cc1eff03a1e196144dc1 SHA-1: 700c81a0364ffdd16dfedcc1387455cd5b72339a SHA-256: 8da516c280a6776b98f8168046b56cae3646ce50b372b1827bb22e7e6ba1c1a8
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high concentration of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=catholic+symbols+and+meanings+pdf, which is linked to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in a potential phishing or malware delivery scheme.

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=catholic+symbols+and+meanings+pdf
    • http://nitigubik.bandstofans.com/uploads/1/3/1/4/131406665/jisojogagavudib_rikodivoton.pdf
    • http://bamulor.artinthecitythemovie.com/uploads/1/3/1/3/131398140/kefag.pdf
    • http://files.birminghamwalkingtours.co.uk/uploads/1/3/1/3/131384791/vinalozusedogake.pdf
    • http://files.sciartmagazine.com/uploads/1/3/0/7/130739684/tojavubafuka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1864/files/nosilatibugujago.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/xumomipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/logituzosebowewenamaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/8734/7360/files/ototoxicidad_por_medicamentos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/cheikh_ahmadou_bamba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/nupejadipopi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/vetibexenaxidadadiwap.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/vegan_ketogenic_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/33497010832.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/17942682418.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_off0000d56e.bin
29bcf20adf0054a75f4c2a2b878ae75ffdfca0632dc36004fff0c24eadc0f5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD56E 6600 bytes
font_01_sfnt_off0000e5e6.bin
1b3c786a49d191f2d7dde13df54ac3582aa69cd992288d727cb1c1a95196befa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E6 5620 bytes
font_02_sfnt_off0000f8e7.bin
6763884e406bb10a9fa6d28385c19f0f634a48847657f7220e0efa8ddfe419e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 17968 bytes
font_03_sfnt_off00012d85.bin
af41690cfc0dbd3a17180e0165af3b171ca68c1f4e2bba2d71a2ca98dd0d4452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D85 16164 bytes

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