Malicious PDF — malware analysis report

Static analysis result for SHA-256 74579d5afc3d243e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-08 13:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c9624aba83d2a5ecb6cc38a0eae86c3 SHA-1: c02729162ff1aae677be2fa36a65dfd6ca7ac21c SHA-256: 74579d5afc3d243e311da74b6cf4078469ac11938618457432e57b22828e85c9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains a URL that leads to a known malicious redirector, suggesting an attempt to direct users to potentially harmful content. The presence of a large number of external links, including those to benign Shopify domains, indicates a link farm or SEO manipulation tactic to disguise malicious intent.

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=adosphere+2+guide+pedagogique+pdf+vk
    • http://golosowe.jamesaodell.com/uploads/1/3/2/6/132681670/240338f66a.pdf
    • http://foxek.districtsolutions.net/uploads/1/3/0/7/130739835/finiw_notuxu_sutivo.pdf
    • http://files.vanessasteck.com/uploads/1/3/0/8/130813546/rurisuginax-nafura-niguduxuzapiku-zemekivutuki.pdf
    • http://files.wetspotfl.com/uploads/1/3/2/6/132682134/voxumatorogex-legaruzol-ziruj-fepujel.pdf
    • http://files.surfacetoairsystem.com/uploads/1/3/1/4/131437676/defaxopukoju-mokukipokis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/xasasepobutaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/introduction_to_ant_colony_optimization.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/mebebopeselugilogokilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/10524259824.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/radogux.pdf
    • https://cdn.shopify.com/s/files/1/0438/3706/3328/files/refowivamawimexomuvusir.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/93265440272.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/75465968600.pdf
    • https://cdn.shopify.com/s/files/1/0438/8713/2827/files/siva_manasil_shakthi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/zajowosivaxizu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/eliseu_martins_contabilidade_de_custos.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d25.bin
ac2c3583eb17df6c9b14f6ecdf1f5ecdf3a51dea4369a78e4e1151e5e51c1f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D25 5644 bytes
font_01_sfnt_off00008055.bin
c1f4d614d35d346bf4388f5459d10bf1b9150b672ae602192cdb120ee293f1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8055 10088 bytes

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