Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ccc04e6d9ca7604…

MALICIOUS

PDF

47.6 KB Created: 2020-08-01 06:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dd0e581efa4a11d7a2aa08795d13080 SHA-1: ec830d822d76b387b7b1afb0bc675fa851d2869a SHA-256: 1ccc04e6d9ca7604225ffc5c992d86ce28ec52f8418cfdf954775957bb036a32
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=openvpn+duplicate+cn'. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same suspicious URL, suggesting a lure to external content.

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=openvpn+duplicate+cn
    • http://files.coldstreamdesigns.ca/uploads/1/3/1/4/131413718/1976223.pdf
    • http://files.triciadetigslp.com/uploads/1/3/0/7/130775554/pilazizuwawedovig.pdf
    • http://files.aspireimmigration.ca/uploads/1/3/2/6/132682142/vomojazariwujewomi.pdf
    • http://files.lovecovenantministry.org/uploads/1/3/1/4/131482819/fobidibupuriganatug.pdf
    • http://files.clairechauvin.com/uploads/1/3/2/6/132681415/2e2071.pdf
    • https://cdn.shopify.com/s/files/1/0429/5160/6435/files/50436608848.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/29677904116.pdf
    • https://cdn.shopify.com/s/files/1/0438/1320/8226/files/tolowok.pdf
    • https://cdn.shopify.com/s/files/1/0430/2874/2298/files/31517573697.pdf
    • https://cdn.shopify.com/s/files/1/0440/4730/2806/files/22120041235.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/17257634149.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/12402530742.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/xanesunewanutegojivulifuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/buposa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/24544521229.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_off0000726f.bin
7e0b25bc3ba86abb4144c07574f9e14305c541fd76f5a2394de31af8f9a6eb0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x726F 4880 bytes
font_01_sfnt_off00008326.bin
184c6a196703864c17b8bac70d673cb2dd0ab1a913773e6c5a1f48c81b1285af
pdf-font-stream PDF embedded font (sfnt) at offset 0x8326 15024 bytes