Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0299f1d1e5f2c6…

MALICIOUS

PDF

61.4 KB Created: 2020-08-09 18:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b73d771e1d04fa388e70b2b6b5310d10 SHA-1: 77ecce7afd9df89218b7de2f9202a0f57bad9140 SHA-256: 6e0299f1d1e5f2c6ddbd10507bd9f1c1370960e113b21a050683d5df45789498
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=ahle+hadees+islamic+books+urdu+pdf`. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the lure.

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=ahle+hadees+islamic+books+urdu+pdf
    • http://files.livinggodsmission.com/uploads/1/3/0/8/130874413/femobupowufebekoluta.pdf
    • http://files.yorktonfarmersmarket.ca/uploads/1/3/0/7/130738823/3747fe095a1761.pdf
    • http://files.ragetoknow.com/uploads/1/3/0/8/130874281/wupusunidalol_kulodesamolol.pdf
    • http://files.townofharmony.org/uploads/1/3/2/6/132695392/limifovoxaramu-motetinawado.pdf
    • http://files.mountainrescueinstitute.com/uploads/1/3/0/7/130775231/a56d6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/chuyn_i_t_sang_nh_dng_hnh_nh_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/46194230755.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/bevaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/tobawedi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/deconstructive_angel.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/85980979087.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/bazofemibewozorax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/moodle_usta_20152.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/tezixesajixiruresetugolen.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/92650083104.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/57024518743.pdf
    • https://cdn.shopify.com/s/files/1/0435/4700/0983/files/1453419347.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/zalefeluwibo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008db0.bin
3e88e35518d5aa8442e34e3233c6c478379355bb85ce0a0136b0b7c44cd5571a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB0 5588 bytes
font_01_sfnt_off0000a084.bin
00d4d63b2eb05fbc28d2835b770f01357e0744b0678a5a065473969896f1d5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA084 15424 bytes
font_02_sfnt_off0000d031.bin
4314e8c7eff5da82f8a75d4a0a7bb59e0e8f3ffa14708de4c13b9d50209c740c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 16856 bytes

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