Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc5f9fcda7055b7…

MALICIOUS

PDF

48.1 KB Created: 2020-09-16 17:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd2de6c006a37becc6b8493274c5d48d SHA-1: 430c23269ba6905027e4606500b678569665f722 SHA-256: ffc5f9fcda7055b788623cbacdcdadea5ba4b7304d7e9ef789503b59b61f49f0
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the string 'Skam germany druck' and a URL that matches the malicious redirector. This suggests the document is designed to redirect users to malicious content, likely for phishing or scam purposes.

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.link/wix?keyword=skam+germany+druck
    • http://womidivu.plumascorporation.org/uploads/1/3/1/6/131637312/kepesutipiziso_bisesaji.pdf
    • http://files.faithfullyfitforlife.com/uploads/1/3/0/8/130813829/wamiwosetulewali.pdf
    • https://81e8ce39-1c4c-4994-963a-66d444c3acaa.filesusr.com/ugd/4bb894_c9c1344d50a0479e8e593c376245a4b1.pdf?index=true
    • https://5f6c9b04-a18f-4639-8fec-1461c3a4b497.filesusr.com/ugd/735189_8bffd376c7a244d996a0cb8a913f5680.pdf?index=true
    • https://bee4ac06-291f-441f-bb81-a403a65caeb5.filesusr.com/ugd/d2759c_f25156541dbd4e33bfec42cceb2c5e96.pdf?index=true
    • https://549013cf-aa52-4539-a2d8-f93a8c309b4f.filesusr.com/ugd/77941b_ffc9d46dbd5e48d88b44e7fe3db5c8ad.pdf?index=true
    • https://a6d22f70-c99c-4244-a887-6e0f6d9963f6.filesusr.com/ugd/ed2d23_7b083da3bb104504a40de58597477285.pdf?index=true
    • https://8bc435db-466c-4d73-ab37-488bf8002e25.filesusr.com/ugd/9cfd0a_9851e8eadf2c4d2aab22efac4df8c2c0.pdf?index=true
    • https://f4d72857-9808-44eb-971d-967bc272c079.filesusr.com/ugd/7a13df_8423c8ada10f40a99b863f34c8737fd5.pdf?index=true
    • https://f9361bf7-18dc-4d91-94e3-ea64b20ea5e0.filesusr.com/ugd/b16523_c6ca9e3692284099a74ca4c1ff7686c0.pdf?index=true
    • https://5466d8e0-1ace-4905-8589-eef4b317a3b7.filesusr.com/ugd/3f80ec_7552a7012dfe408fab6d28def59f8a16.pdf?index=true
    • https://8ef7b55c-c838-4e7a-834c-7dee87c45085.filesusr.com/ugd/77941b_b9bcef70b5cc479fa4d4169af3438e0e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/9479422636.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/46168938824.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/51287919557.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/16002399080.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5833/files/commutative_banach_algebra.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_off000074a9.bin
2a2b975ad8efb26597b1b86f2ac9529669cbbd56fda1bc3ef5b86fb96f6c9c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A9 5320 bytes
font_01_sfnt_off000086b8.bin
367755d9a0101ecdd5bfefa1c554855305206accb8854b74072a75675b121d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B8 14240 bytes

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