Malicious PDF — malware analysis report

Static analysis result for SHA-256 77316b0e610ea8b2…

MALICIOUS

PDF

48.9 KB Created: 2020-08-08 10:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86b30a2c24b264553708617e9aec30d8 SHA-1: 22188344406c60dc57d11086153179754c3612db SHA-256: 77316b0e610ea8b28e85947acd48a9ae550ab0668ef0f1c321788d530d261628
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com), indicating a potential phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure.

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.com/pify?keyword=anandabazar+patrika+today+news+in+bengali+language+pdf
    • http://files.nexacreativeconsulting.com/uploads/1/3/1/1/131163740/411807.pdf
    • http://files.lasperlastv.org/uploads/1/3/2/6/132681460/833870.pdf
    • http://files.belllog.org/uploads/1/3/0/7/130775827/2358242.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/34817616288.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/fofexutunapa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5712/6295/files/pesimemewi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/dwarf_fortress_manager.pdf
    • https://cdn.shopify.com/s/files/1/0441/2735/5032/files/descriptive_essay_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/bosch_alternator_wiring_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/universal_sunroof_kits.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/74552651763.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/dinajolowedawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/laserdisc_vs_dvd.pdf
    • https://cdn.shopify.com/s/files/1/0428/8089/3084/files/dilonogi.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b1.bin
311526a7db18637d0ef29d4e23001abcf030ae4dd2f5cca6e0471b4a2e3ae7ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 5644 bytes
font_01_sfnt_off0000761c.bin
b734b3fb5d742c4ca3623076c1b4d0543ea1413f42becce1395f2f38b70ede2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761C 9324 bytes
font_02_sfnt_off000093c6.bin
f4421a022353d8d71e2f2a6e568eb353597871d473c0dbd440ab505ccce4069f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C6 9900 bytes

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