Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7674e3dd2b7e8dd…

MALICIOUS

PDF

47.2 KB Created: 2020-08-04 14:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e40709f63229e3305866b7877e2fd380 SHA-1: ef3c35998a2a1185a841604414a1130a7715c580 SHA-256: f7674e3dd2b7e8ddf6f08885c6d90d59bfc77b64d184023cc6c301079a5615dc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body text, though partially corrupted, includes the same search term as the malicious URL, suggesting a lure for users seeking specific content. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious URLs. No scripts were extracted from this sample.

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=aditya+hrudayam+in+tamil+pdf+download
    • http://files.zsquaredcosmetics.com/uploads/1/3/0/9/130969431/ragedi-velunijabut-vagaviruli.pdf
    • http://files.clareandkatie.com/uploads/1/3/2/7/132710779/4982749.pdf
    • http://files.laducaautoservice.com/uploads/1/3/2/3/132303269/xerumop-wadigo.pdf
    • http://files.kappahouseonprospect.com/uploads/1/3/1/4/131437984/rumiwazufego.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/loxaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/jegekesowiti.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/toxowipividubiniwod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/kavupobememajuxagapoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/69949747855.pdf
    • https://cdn.shopify.com/s/files/1/0429/2529/3724/files/how_many_years_is_a_million_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/discord_can_t_hear_other_person.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/fubamegegewelez.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/20601567883.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2913/files/alcohol_units_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/poviveguduzozigomilil.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/big_daddy_kane_smooth_operator.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_off000076d3.bin
6b85005755f41df51b437f55d3e8bbb134b15cc394b13239fa34e2a34605ce7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D3 5288 bytes
font_01_sfnt_off000088ba.bin
7361261526f3a76d562dabddf7fa8a142e5e820dfcc70afdcc0dd072c8e7a153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88BA 11896 bytes

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