Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0ac3c068e1b49e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-23 23:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47310ae4acde1b1371d7781360f8fe06 SHA-1: dc7a3e1b8405edc703ba70d80af32b31a6d98415 SHA-256: 7c0ac3c068e1b49e26a657b114fe8dbf1a4bb65a87abad5724e0821d8618feaa
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially for phishing or SEO spam.

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=bhojpuri+video+gana++dj+remix
    • http://files.anahataretreataustralia.com/uploads/1/3/1/3/131383949/niludomonexegefafaf.pdf
    • http://files.nickynoodlesdoodles.co.uk/uploads/1/3/1/4/131453725/midiluzo.pdf
    • http://files.dagfrognes.com/uploads/1/3/0/7/130739480/0c25e375009.pdf
    • http://files.irepairtools.com.au/uploads/1/3/1/4/131483372/b7f51f4bdb75fa0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0464/5240/8488/files/77816003896.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/13836855586.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0111/files/3543193311.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sebifoxof.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5558/files/diluto.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/gexusedetixize.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/10315471597.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/loviverunonegadapuzivovas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/definitions_of_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/22189451733.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/sutepiwokarufitevapa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/the_mysterious_benedict_society.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_off00004f91.bin
796f7743528b83e6dda2f68306b449b7c9854a28f2725851a83c742728a7356b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F91 5416 bytes
font_01_sfnt_off000061e6.bin
cfa3a43e013fa14cf35802cfa20240882a3f87b040795141d6d4e4c1e3c12aa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 14712 bytes