Malicious PDF — malware analysis report

Static analysis result for SHA-256 2759c83d7fe74a3d…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 12:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f044b53935e0421036248a2c1860f62 SHA-1: cc7a1d495e21fbeb90f7dfb2d94df84350875ae3 SHA-256: 2759c83d7fe74a3d9ffc9f414892bc738d4b1977d6bdba44a4308bb0ce9b3b6c
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=entertainment+portal+website+templates', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to external content.

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=entertainment+portal+website+templates
    • http://bizalizu.vinyldesignyl.com/uploads/1/3/0/9/130969082/pamumujezefo_gowonobijidilun.pdf
    • http://files.thesummitx.com/uploads/1/3/1/3/131398159/figotu.pdf
    • https://applications.prevention.ca
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4487/files/84010739270.pdf
    • https://cdn.shopify.com/s/files/1/0432/3069/1485/files/gidek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/astronomie_einfhrung.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/modern_business_process_automation.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/lua_else_if.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/27216105688.pdf
    • https://cdn.shopify.com/s/files/1/0430/9093/5969/files/niniporekogiwuju.pdf
    • https://cdn.shopify.com/s/files/1/0438/4070/0578/files/1808577616.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/16170400919.pdf
    • https://cdn.shopify.com/s/files/1/0429/2375/3635/files/14751964174.pdf
    • https://applications.prevention.cancer.gov/ncorp-portal
    • 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_off00006f70.bin
4c09c79dbbf413234e8d55e1b9d8006f1a0591a607c8c7f41fabaaef52574414
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F70 5156 bytes
font_01_sfnt_off000080e6.bin
07f13a43d18e00b720ad5d14da46db9e0e9a2db9bd0177cee98f8e1ea999234f
pdf-font-stream PDF embedded font (sfnt) at offset 0x80E6 10444 bytes