Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0a6a5b1f1a398a…

MALICIOUS

PDF

69.1 KB Created: 2020-08-01 10:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f93015c54bb9285ca4e6dfef4504a65c SHA-1: f968104d92dfb34a4bb02a5f33e2e57e41f5ddf8 SHA-256: cc0a6a5b1f1a398a2031fdece0c28419346d4954c80296752fdd06f21880446a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though partially corrupted, includes text related to a 'study guide' and the malicious URL, reinforcing the lure. The presence of a link farm indicates an attempt to distribute malicious content widely. No scripts were extracted, but the primary attack vector appears to be the embedded malicious URL.

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=afaa+group+fitness+study+guide+pdf
    • http://files.wrmgllc.com/uploads/1/3/0/8/130874055/wogedeniwebe_wesafiviji_kemifuwijojo.pdf
    • http://files.altacedar.com/uploads/1/3/1/1/131164118/gatujoj.pdf
    • http://files.mrtechyon.com/uploads/1/3/2/6/132681359/af06e.pdf
    • http://files.dashatron.org/uploads/1/3/1/6/131606146/3e62b2f134a3.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4399/files/pesalebepizekigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2111/5298/files/56423383296.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5214/files/tabufalifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/46287294786.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/91804145534.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/30693406744.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/gedukigovufavofarijipevo.pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/86953793513.pdf
    • https://cdn.shopify.com/s/files/1/0431/5136/0164/files/31732049361.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/zevubenixedozijifir.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/kakar.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/redot.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_off0000c70d.bin
cd9c9b755968945cd806151430b99d93aebfc5f7867843555d425b92f7a16d52
pdf-font-stream PDF embedded font (sfnt) at offset 0xC70D 5268 bytes
font_01_sfnt_off0000d918.bin
f4fb725d5ad1c88591e3bc977c31d94c6a55b8edae08777a86789ee580de4f8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD918 14808 bytes