Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb928f6acc46141…

MALICIOUS

PDF

44.3 KB Created: 2020-08-05 16:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1d84e69b51fa5b7b6ec438f01f01c7b SHA-1: be948af12c07e9bc19945996a701072a8669a684 SHA-256: bbb928f6acc461414033da2c77cc26adc418526b905f913dcbbfc6ec578ff068
150 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 pointing to 'https://ttraff.com/pify?keyword=biofertilizers+notes+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on shopify.com, likely for SEO manipulation to increase visibility. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=biofertilizers+notes+pdf
    • http://files.leapoffaith4u.com/uploads/1/3/1/4/131407045/29830.pdf
    • http://files.liffordhealthcentre.com/uploads/1/3/0/7/130775366/tujazawulubaje.pdf
    • http://files.stevecuno.com/uploads/1/3/0/9/130969356/nifer-bozegoburogeg.pdf
    • http://files.vixbrowneauthor.com/uploads/1/3/1/1/131163718/3517348.pdf
    • http://files.dragonflyproductions.net/uploads/1/3/1/4/131409037/4343292.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/janidafemojufut.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/tebetev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5303/files/incidencia_de_cesarea_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/parts_of_bahay_na_bato.pdf
    • https://cdn.shopify.com/s/files/1/0438/9987/9576/files/ssw_dealer_supply.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/vabefetunosizixajideteje.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/pinoxugenevuwidadaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1129/files/20113375170.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/52387758390.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/2005_dodge_ram_1500_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/madazikosid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/40416904697.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_off00007069.bin
a3f3b3287ee189c3e804b81b94e2965c3416cbc06922f3136ab32d8638697e8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7069 4924 bytes
font_01_sfnt_off00008144.bin
fbf8abeb0a22e28fb34339e852b80968216bd62f5790dacb507ca3cdc24d712b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 10404 bytes