Malicious PDF — malware analysis report

Static analysis result for SHA-256 5184c5c89e596c9c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-24 18:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4040d42f87c6b5c77010f268f61b4a6e SHA-1: c4d55ea39164ca7a75017c3925887f3511a36fe2 SHA-256: 5184c5c89e596c9cfd8dcf10f1260a24cef19bbc3cf100edfcee298c50a0fcd8
120 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 of which point to external resources. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=non+locomotor+skills+worksheet+for+grade+1`. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=non+locomotor+skills+worksheet+for+grade+1
    • http://files.creative-expressionsweddings.com/uploads/1/3/1/1/131164174/3f9d4.pdf
    • http://gasedi.castleviewbands.com/uploads/1/3/1/6/131607131/a9c75d3553.pdf
    • http://fopudasuw.mayorsbookclub.org/uploads/1/3/1/6/131636725/besapi.pdf
    • http://files.theashbury.com/uploads/1/3/1/0/131070500/mamasufav_setejon_vemofuvaxogel_wufuramovip.pdf
    • http://pokimidux.oeorchestras.com/uploads/1/3/2/8/132815028/lazaxumekek.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2714/files/protocolos_adicionales_a_los_convenios_de_ginebra_de_1949.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/jarifagiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/pebuguruj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/dinewulejuregoborepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/lebamukam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/82881950326.pdf
    • https://cdn.shopify.com/s/files/1/0436/3304/9753/files/cluster_computing_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/24771217721.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/8830496806.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/rapidex_english_speaking_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/haeckel_s_three_kingdom_classification.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_off0000603d.bin
953f23c87f8ee02f731e07987b65c21784bfdc9e94b5c89ee7cf054ba1d6832b
pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 5612 bytes
font_01_sfnt_off0000733a.bin
c69d81a3dfeed4413791863138d071a62b138e33c4457376e86cb0eacbe35d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x733A 10104 bytes