Malicious PDF — malware analysis report

Static analysis result for SHA-256 985704686ce63813…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 11:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1de06d3973397e8b1bd92ef4cbb9fbc8 SHA-1: bb96baf5b61c618ce2d1c0b145d616cb3837cc29 SHA-256: 985704686ce638130082c337669301d78fcc272acac738443c1d3bc59c3c81ff
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to an error message and a URL that matches the malicious redirector. This suggests the PDF is designed to trick users into clicking the malicious link, likely leading to a phishing page or malware download.

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.me/wix?keyword=error+0xc00007b+llamada+de+error
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/nopexezotinajegedegavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/51294131739.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/sosawoxaba.pdf
    • https://static.usrfiles.com/ugd/30e015_96a6881ca64b477690fbf8150410a213.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/berekegazeduvamomurogop.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/niburosuwijaverofevo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/dufitirekupomexipixav.pdf
    • https://static.usrfiles.com/ugd/73f3b0_bef37fa5e58c45ffae34033ee5247d96.pdf
    • https://static.usrfiles.com/ugd/067ecb_3e18297044ad4e1eb5dbd167ed626200.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_off00005869.bin
708f9c5fd460d39499b28e731cf3b28146986fec2615f5c583dcc6a7b63f5994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5869 5296 bytes
font_01_sfnt_off00006a56.bin
b41cbf5f1c813df790cf13a63cdfe082167c8e59688ac0b83bb65ea61ca6973e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 10052 bytes
font_02_sfnt_off00008ce7.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE7 16204 bytes

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