Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb5e474261b6b04…

MALICIOUS

PDF

42.7 KB Created: 2020-08-19 00:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce84dca949c4ec42a4f21ad3aa27f971 SHA-1: 535cd9ad2db4e7f89a0aaf8fff1dec0025392cdb SHA-256: edb5e474261b6b043481d303f9a0ae1bd54a07c1b5c3244328be95154636963b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL https://ttraff.ru/pify?keyword=call+of+duty+ghosts+pc++bittorrent identified as a malicious redirector. This indicates the document is designed to lure users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=call+of+duty+ghosts+pc++bittorrent
    • http://files.edisonamigos.com/uploads/1/3/1/8/131856904/xesuwuzovova_fixazonotebewi_jonos_lawofatanoki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/7509965531.pdf
    • https://cdn.shopify.com/s/files/1/0436/0372/2402/files/94609577066.pdf
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/16700311519.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/tikiwuxibarurafoze.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/66664165601.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/breast_cancer_classification.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3566/files/jazerekeliripezaka.pdf
    • https://cdn.shopify.com/s/files/1/0450/7539/8821/files/vivud.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/47410315532.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/43653028384.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/basugukasux.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_off0000646a.bin
01dd75f221124d0a0af4b1b702e8296dfde6c2cb7f6d08625e939adcff7923dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 5564 bytes
font_01_sfnt_off00007751.bin
4f7109cab4c4100bb33ba8066f45b8828b4b01ae41505e95d1b9f1774091db27
pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 12168 bytes