Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcae862b4013b8a…

MALICIOUS

PDF

46.7 KB Created: 2020-08-21 09:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65369404b57eeb4facd604a6a0b65234 SHA-1: d680bc1f5be1f84b3819f5f8f7d4d726a2e4dd68 SHA-256: 0dcae862b4013b8acc824680a81ea1f3613e761ca023afa42ec0af8ccf6df441
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains references to archery targets and URLs, suggesting a lure to a phishing or scam site. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms the intent to lead the user to a harmful destination.

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=printable+archery+targets+pdf
    • http://files.centralladycatsoccer.com/uploads/1/3/0/8/130873908/govavalewarifenizuva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/broader_performance_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/83240153266.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/tadelugegakokanelirafugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/53479947312.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/93513769597.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/deledaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/89046811437.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/bakagokono.pdf
    • https://cdn.shopify.com/s/files/1/0461/5520/2723/files/arx_fatalis_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/96058698478.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/rokururusoxu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007992.bin
781d4d8af1cfdd8997b80fe82f67871b0072067ea06813d07d5a12f83f181963
pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 5660 bytes
font_01_sfnt_off00008cc0.bin
00dcbe92d2ea45bf9e46480faca7e0c0ee16e71cd5ec45e13eee7861f3e76b86
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 9908 bytes