Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfb76bfd4417173…

MALICIOUS

PDF

48.6 KB Created: 2020-08-22 08:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb7dcd9a815c76eb764421339c6f8c2e SHA-1: ec80ad3874df624e479db10ec082ded289e00764 SHA-256: cdfb76bfd4417173835bde9b9aa4d74c8b82091decfd57a9a5a85791393c8eab
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or redirection tactic to distribute malicious content. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URLs, 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=voyage+belek+golf+spa+fact+sheet
    • http://files.smwa-cloudcroft.com/uploads/1/3/1/0/131069890/kedonotujuzatag_rusipi.pdf
    • http://vakoxu.artguildofclifton.org/uploads/1/3/1/8/131857315/nojijujemomagal.pdf
    • http://kanilom.chappellhillgardenclub.com/uploads/1/3/0/8/130874493/kumiwot.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/33062389365.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/capra_cu_3_iezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/zuromexejapezotokux.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/rakototigenarux.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/73213694361.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/wordpress_global_variables.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/42654210446.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6351/files/83943830522.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072f4.bin
0d4597e48be883afaaec9b334f02a11d79392e0e9a4f73569612186261b434c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F4 5084 bytes
font_01_sfnt_off0000845d.bin
988f8be908ead85f1d53bd4afcf09d248f7fb5c35316bc175a6cb7e7f40a5f58
pdf-font-stream PDF embedded font (sfnt) at offset 0x845D 10328 bytes
font_02_sfnt_off0000a7bf.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BF 4324 bytes