Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec906e5ed2e723ee…

MALICIOUS

PDF

65.7 KB Created: 2020-08-20 21:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc69d6b83416d2cc57087de8c7d5a695 SHA-1: 97baa4c64952b4049b846e2d6e74f3e56ae9754e SHA-256: ec906e5ed2e723ee7061db7671eceb2cb18c74defde504ed4a5a50dc9a6d0a62
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 'https://ttraff.cc/pify?keyword=darkness+rises+gear+guide'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify domains, suggesting an attempt to distribute content or mask malicious activity. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL, reinforcing the lure.

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=darkness+rises+gear+guide
    • http://files.whistlingfrogresort.com/uploads/1/3/2/6/132681002/masaberilanimubaloji.pdf
    • http://files.sharonreeddesigns.com/uploads/1/3/1/3/131397960/8080745.pdf
    • http://files.mistressmaryhell.com/uploads/1/3/0/7/130738593/titodubovorisenoxofu.pdf
    • http://kifujuwi.knowlogix.com/uploads/1/3/0/7/130776791/dofovomojaseluk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3037/1738/files/vibetofuzigowulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/kixun.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/classic_engineering_guide_wow.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/javelopuvibeginazug.pdf
    • https://cdn.shopify.com/s/files/1/0437/9328/5277/files/zubokamojivaleribi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7555/0873/files/nokoxuwirapupamevide.pdf
    • https://cdn.shopify.com/s/files/1/0428/5448/2079/files/66957719192.pdf
    • https://cdn.shopify.com/s/files/1/0462/6949/7493/files/jsw_cement_ltd_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0447/9759/1701/files/44752051414.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/56342328129.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/xarepenekod.pdf
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/war_cisco_kid.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_off0000c4f2.bin
41aaf49ffd75169824a708eb99c9b34c6e3f504b91d21419261dcc10ab3ad25a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F2 5024 bytes
font_01_sfnt_off0000d615.bin
0c2f6ecfa65e0d777ab38fb08f10fba816fc2835250382bad62c86a876187bd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 10360 bytes