Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf45ed209e9ad22…

MALICIOUS

PDF

41.7 KB Created: 2020-08-16 22:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 194ad481aaf323f2aa04d8ad2824a52a SHA-1: e7816e4ade4a4cfa85a32093b43e76b23ab2dc73 SHA-256: baf45ed209e9ad221b00b3b2b09ad7e6ed55be836e35d7dbb7031eacb5b27d0d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'Flyers template psd' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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=flyers+template+psd
    • http://files.hamptoncommunitykinder.org.au/uploads/1/3/1/6/131637056/8391510.pdf
    • http://rivonuv.alexjtunney.com/uploads/1/3/0/7/130775934/7989472.pdf
    • http://zojow.lifefashionfun.com/uploads/1/3/2/6/132680813/b8ba40b.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/sekutibowadokebokuxozem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2773/files/62343678522.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/novorilexenuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/17395057794.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/dajax.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7155/files/likafozurowupoge.pdf
    • https://cdn.shopify.com/s/files/1/0450/0822/4414/files/verizon_fios_channels_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/19999272449.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6893/files/website_layout_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/14324854435.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/46202434614.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/48522002413.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/41239405238.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_off00006602.bin
bd0e255405d8b6e76f38155f0fee0a0a3a7aea0d40b951c5395d41aa0e6fcf02
pdf-font-stream PDF embedded font (sfnt) at offset 0x6602 5164 bytes
font_01_sfnt_off0000777e.bin
ff29f3d8bc5cd5b4b831f90fd38d44640dbabcf6b96db543b8e5df6119fe03cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x777E 10028 bytes