Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaba9676bce03fa…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 00:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc5e44f1d2c8f36753359b1352eb890e SHA-1: 6a0b822c8b1fa379733d2bfbbc6b660105211fd6 SHA-256: ccaba9676bce03fad4163c9dc7cba72e3104025c92c182110d6c2cf7d631adf5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=bmtc+bus+pass+form+pdf'. This indicates the document is designed to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=bmtc+bus+pass+form+pdf
    • http://files.samyakyamauchiart.com/uploads/1/3/2/7/132740291/puxosu_pijuwevon.pdf
    • http://rixuzos.trinitybaptistglobeaz.org/uploads/1/3/2/3/132302782/siwutemufut.pdf
    • http://xorigaz.dirtydavesdetailing.com/uploads/1/3/0/8/130874197/8857657.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/hamilton_beach_water_dispensers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/62093275975.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/spell_check_software.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/88412380929.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/migojok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/jurnal_biosistematika_tumbuhan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/gixabigobi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/40790415565.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/convertir_de_a_word_editable.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_off00006bc6.bin
88dc4e99c9e57b256a189241d6d13d74859aace96dfcdc5aea335d597c78f84c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC6 5456 bytes
font_01_sfnt_off00007e35.bin
9a40552e6c97d6ba9690c59dd39f404d7f6675a65d9078916ffc14ff85563739
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E35 10076 bytes