Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4cc0eb320b8c4c…

MALICIOUS

PDF

44.1 KB Created: 2020-09-01 13:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34e7d35d4e741eb10ac91c578a3da63b SHA-1: db6d9a20f193a7433152234d3812f25fa890c8ea SHA-256: ea4cc0eb320b8c4ccb43ba53731f420b75732f7a31dc27e16125ed6c61ff9fcc
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body and numerous embedded URLs suggest an SEO poisoning attempt, where the PDF is designed to rank for search terms like 'adhurs telugu hd movie' and redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=adhurs+telugu+hd+movie
    • https://cdn.shopify.com/s/files/1/0463/1334/1090/files/17695427757.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/fuvux.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/virapese.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/bowavigixikilolofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/fabururirogiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/todudemanitovovo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/guzubimuge.pdf
    • https://cdn.shopify.com/s/files/1/0461/6791/6696/files/venovujinivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/barron_s_gre_book_20th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/osrs_cheapest_construction_guide.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/python_clear_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/35422872862.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005971.bin
35808ff94efede15b32cc13f467644691af4425a51309d8f00c7721975949bfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5971 5080 bytes
font_01_sfnt_off00006a93.bin
54bda8514f9110297725fbfe4d7449ca6f3c5a24d5715b16b19afcea33652257
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A93 10456 bytes
font_02_sfnt_off00008e98.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E98 16164 bytes