Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff355ea587236700…

MALICIOUS

PDF

32.6 KB Created: 2020-08-18 23:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee89dabc9e90eff12cf2a37cad52833e SHA-1: 51fb23fd45411b816a854e295811b8bc627433ce SHA-256: ff355ea58723670033f543d8d514e9b555770dcec75fb9ee9cf8dcc87fd5b91c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure related to a movie download, which is a common social engineering tactic. It embeds a link to 'ttraff.com', identified as a malicious redirector. The document also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=bazaar+kannada+full+movie++2018
    • http://files.petphetish.com/uploads/1/3/1/4/131438808/kefubumujux_timowibexe_xazesudolaxota_zidek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/34563826274.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/94293134840.pdf
    • https://cdn.shopify.com/s/files/1/0447/1826/0377/files/waterfall_quest_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0438/0730/9984/files/bellboy_uniform_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/50279365118.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/america_anglo_saxonica_resumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/buder.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/parallelogram_law_of_vector_addition_practical.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/43930791827.pdf
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/binet_s_formula.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_off0000401c.bin
be4eb270f83f6f5a73fd763cc8ba7490910e5aedbb6c993a7829f82152115364
pdf-font-stream PDF embedded font (sfnt) at offset 0x401C 5616 bytes
font_01_sfnt_off00005333.bin
e85c590156d59fe81b6ef216190b331e48c04bd52f6e9fd642d9701e0f70afac
pdf-font-stream PDF embedded font (sfnt) at offset 0x5333 10248 bytes