Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e96dbc3a3cacc9b…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 11:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cafe2ef5650f089da56a2b2b48f92d3e SHA-1: 6bf6f43525b4ba489fb0db5bb77d6f9904e7866c SHA-256: 8e96dbc3a3cacc9bc9098d36f25ad58686735d08fb50d9beb11af4db31086a3c
152 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a free download for a PDF to Word converter. This link redirects to a malicious redirector infrastructure (ttraff.com), indicating a phishing or social engineering attempt. The document also hosts a large number of external PDF links, many of which point to potentially malicious or unknown domains, suggesting a link farm for SEO manipulation or further distribution.

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=pdf+to+word+converter+free+download+full+version+arabic
    • http://botoru.solidstatecircus.com.au/uploads/1/3/0/8/130874359/rewufi-rajixemiz-robesipalil.pdf
    • http://nonos.alexandercarey.com/uploads/1/3/1/4/131406390/19235.pdf
    • http://fisizos.catalin-jugravu.com/uploads/1/3/1/4/131406893/4ac986854d.pdf
    • http://files.mistoryfox.com/uploads/1/3/1/0/131070166/seguzadavowa-tevenomugaxafu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/bruchrechnung_grundlagen.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/99771239579.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/target_band_7_ielts_academic_module_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/64421518724.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/povuxakobugazugewidetox.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/datejukuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/barbell_medicine_training_templates.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/types_of_enzyme_catalysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/sofarogud.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/23961438468.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/jamuwasuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/18212791507.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006672.bin
3763187d2c043b6242107aeef47bc7e7bd1c89c3954dedcd4dc8f9d7e512e232
pdf-font-stream PDF embedded font (sfnt) at offset 0x6672 5308 bytes
font_01_sfnt_off000078a0.bin
0e8ff9796857921887f311ee0cf775cb9d67cbc0d65428c63bce9d97945f364a
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A0 9860 bytes