Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4cc5642553d156…

MALICIOUS

PDF

43.9 KB Created: 2020-08-15 00:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb5a1edee2afcdbcc91826bddb5d3428 SHA-1: 58d63892620189ccbd4012ecd6f1d30828d717c9 SHA-256: 3e4cc5642553d156e149483069518cb7a6074a2d364088fbc134411a0036b2b6
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised with a lure related to 'CCPA information security requirements'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the ML classifier strongly indicate malicious intent. The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or redirection strategy. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=ccpa+information+security+requirements
    • http://files.ohionationaldollshow.com/uploads/1/3/2/7/132710782/9dfa3f.pdf
    • http://files.rwaconsultants.net/uploads/1/3/1/4/131438474/7822228.pdf
    • http://files.centroluz.org/uploads/1/3/2/6/132695516/1da3c505409a6b9.pdf
    • http://wenokesip.simonbarnesfineart.com/uploads/1/3/1/4/131483281/nesajofiniw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/89818503728.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/99980705900.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/begumpet_railway_station_platform_2_address.pdf
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/nedopasagumuvuxatekibi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/mexegiteniwusoxas.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/kicker_bundesliga_spielplan_2018_19.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tepumesuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/pipuruvimo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/rational_choice_theory_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/86380583396.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4405/files/koxupefumigozurexi.pdf
    • https://cdn.shopify.com/s/files/1/0451/7753/6663/files/surya_the_soldier_south_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0447/3182/6325/files/adobe_after_effects_cs6_shortcut_keys_free_download.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_off00006d4e.bin
06220ab16d3a3b1e32fec72fe5881c80d6f7b751a941c1fc4635da9cc9e27ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4E 5264 bytes
font_01_sfnt_off00007f23.bin
8ff7d2f4b0a49f963aad857bd53c0b3d2042db277a4c7e1475e904e92e03b234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F23 10320 bytes

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