Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2a946645c2d0b5…

MALICIOUS

PDF

45.5 KB Created: 2020-08-27 14:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ed02c339c375dd9ad0b31b2667556a SHA-1: 71e18b618cb841625cc20fc2a407ca5669416706 SHA-256: 4c2a946645c2d0b57d3d306202b29312ecdbe55c41e7118e5e233425c0035add
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a primary link directing to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to a 'hidden city hidden object adventure walkthrough'. The presence of a link farm and the ML classifier's high confidence indicate a malicious intent to redirect users to harmful content. No scripts were extracted, limiting the analysis of direct payload execution.

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=hidden+city+hidden+object+adventure+walkthrough
    • http://files.bensondavis.com/uploads/1/3/0/9/130969592/vedimo.pdf
    • http://sibiro.counselingwithjessica.com/uploads/1/3/0/8/130814328/2587782.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6597/files/zagozasexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/93766025477.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/83330759224.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/93441833888.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/89143094940.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/xetap.pdf
    • https://cdn.shopify.com/s/files/1/0440/2996/8534/files/brahmagupta_contribution_to_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/civic_education_curriculum_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0431/2979/8807/files/lodizor.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/51551979438.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/solid_waste_management_filetype.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_off0000732f.bin
fcd946d0a84973426341c4a529110d4a2d59e840e1f707135586093adb09331e
pdf-font-stream PDF embedded font (sfnt) at offset 0x732F 5516 bytes
font_01_sfnt_off000085fb.bin
f7a2ecd7b2870f3bd471b7ab1373d091cb59d4b3b9db38bd22438a4eaf1d2ecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x85FB 10384 bytes