Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6b0bbc9ca3c02f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-13 21:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1caaa6b224c6cfa0a4e2b0a6c0053e6 SHA-1: 37ed1f8301d029a2797b4c5d25d893c3b3e05786 SHA-256: bd6b0bbc9ca3c02f12127318ecbf3f7863caf522af9b4a4ae2215d7a88a07d1d
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm with numerous external PDF links, many hosted on Shopify. The embedded URL points to 'ttraff.cc', a known malicious redirector. The document body contains garbled text but includes the target URL and several Shopify URLs, suggesting a lure to download further content or navigate to malicious sites.

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=sodium+salicylate+safety+data+sheet
    • http://files.yogaforkidsportland.com/uploads/1/3/0/7/130775310/8614018.pdf
    • http://xogoru.somervilleeyecare.com/uploads/1/3/1/0/131070152/cb00176.pdf
    • http://lutala.shopfashionrescue911.com/uploads/1/3/1/3/131380213/5917403.pdf
    • http://files.studioaase.ca/uploads/1/3/0/7/130739601/9032659.pdf
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/livro_cabala_mistica.pdf
    • https://cdn.shopify.com/s/files/1/0438/1615/7344/files/80311948312.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/boogiepop_returns_vs_imaginator_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/fire_emblem_path_of_radiance_ebay.pdf
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/34776825066.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/40810408779.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/wamajonikivirolitowibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6624/files/70488007442.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/sort_dataframe_in_r.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_off00006014.bin
aec73b34cd826742da56be3988e9ed78f3367b66c01f65262e26e5a03a8d8f82
pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5368 bytes
font_01_sfnt_off00007236.bin
bc618357d63cdafc1bd7cabb131eb19ce91f8d977f8d27a4a37f077ee1117b5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7236 10780 bytes