Malicious PDF — malware analysis report

Static analysis result for SHA-256 05615746760d86f1…

MALICIOUS

PDF

46.8 KB Created: 2020-08-06 04:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df08039361a3713644e4705d227ba418 SHA-1: 514aca85282764aa3b61f1fde8036d1313e24fa6 SHA-256: 05615746760d86f1f05e137e234fe530f78aaac2f085b35ab616999c83fc28f8
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to ttraff.com, indicating a phishing or scam attempt. The document body, though partially garbled, includes the URL and suggests a lure related to language learning materials. The presence of numerous external PDF links further supports the SEO link farm heuristic, suggesting an attempt to manipulate search rankings or distribute malicious content.

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=lista+de+adjetivos+en+ingles+y+espa%25C3%25B1ol+pdf
    • http://files.robin-mccarthy.com/uploads/1/3/0/7/130775092/8163159.pdf
    • http://files.lipstickandhockeysticks.com/uploads/1/3/0/7/130776817/7908778.pdf
    • http://repixov.southcallawayfootball.com/uploads/1/3/2/6/132695569/2349256.pdf
    • http://files.karencostawriter.com/uploads/1/3/1/4/131484029/7746533.pdf
    • http://files.wnazario.com/uploads/1/3/2/8/132814241/wabizupubir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/masinurewodez.pdf
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/tipos_de_capacitores.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/56335149517.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63032467643.pdf
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/jubipukuwukigufeje.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/dibuburu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/56915630203.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/42288114105.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/tachycardie_atriale_multifocale.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/jakoveru.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/88943488013.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_off00006cdd.bin
175adc57b9ac8960cb366ad4f48ce7793201dadac8d6f635ad64253aa2d73cfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDD 5504 bytes
font_01_sfnt_off00007f88.bin
20cbed8e5eb70551fd9b69af3f7ef2d3b9fea436de13180ca6884dd1a5ae8134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 14640 bytes

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