Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b553ae67340f8e8…

MALICIOUS

PDF

46.4 KB Created: 2020-08-01 22:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c7679412675b3860d07614356cb5cc2 SHA-1: 0362ba6d27fc0e6c08af167f33db08223e4f3956 SHA-256: 5b553ae67340f8e840a562fb71234b19370cfc1a493c28ebc92fb18e026ad7fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm. One of the primary links, https://ttraff.ru/pify?keyword=sorted+list+java, is flagged as a malicious redirector. This indicates an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing.

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.ru/pify?keyword=sorted+list+java
    • http://files.jjtothethirdpower.com/uploads/1/3/0/8/130813100/a8eaa395b77970b.pdf
    • http://files.dancetemplesaltspring.com/uploads/1/3/2/7/132740836/rerajogebojadu_xijotap_xoromake.pdf
    • http://files.1stonthreads.com/uploads/1/3/0/7/130740517/tafoxijomok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/ryobi_c430_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/59739403542.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/tasumovawasaxewibugeguxin.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/sukupanuziponugin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9538/3446/files/tobibutafuwisuxoxuwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/88499660140.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/xelerumajumamolezus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38664456414.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/41715893754.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/4583690521.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000702d.bin
da1d505490a74977dfe2f6281d5170c7bead7e28791f51f77c0f67d4e96a0f80
pdf-font-stream PDF embedded font (sfnt) at offset 0x702D 5056 bytes
font_01_sfnt_off0000816e.bin
02c57447a38fd9b456d4c70b00bb6c7816daa9b97f0da9fa60ad1fd7ec63986b
pdf-font-stream PDF embedded font (sfnt) at offset 0x816E 13760 bytes