Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d711e9c533ce24…

MALICIOUS

PDF

50.2 KB Created: 2020-08-19 17:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76a540fbabf76ba4367ae90d98fa7870 SHA-1: 6bc944a8b0600309ba6eb9f34e2543955eb2f332 SHA-256: 13d711e9c533ce248c9ac0113b2aa82c1687f0277ac213c1fcc3a73ae91edb48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external resources. One of these links, https://ttraff.cc/pify?keyword=nice+guidelines+ptsd+update, is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to lure users to malicious sites, potentially for phishing or malware 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.cc/pify?keyword=nice+guidelines+ptsd+update
    • http://files.sailabilitybatemansbay.com/uploads/1/3/0/7/130739919/3479141.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/57272169801.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2415/files/razilufifatunos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7778/files/1590460439.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/business_law_8th_edition_cheeseman.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/lelomezogulugawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3743/files/super_mario_bros_3_nes_rom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/kozefatukaxazalefijalalaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/visojulidogujinuzodelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6277/2380/files/20967696436.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/radio_biafra_international.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_off000088cd.bin
b847f37b7bcb4db11d5dbb16930ba1809d91c247ed74b36bc6e03d2bb5788e8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x88CD 5112 bytes
font_01_sfnt_off00009a46.bin
ed47aa794df5410ab1791740bbdaa9b480b0c20201fd06e14b8acc055c9e6112
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A46 10028 bytes