Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a9ee0c8351c7ae…

MALICIOUS

PDF

49.8 KB Created: 2020-08-20 21:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb71dfe5eb219328840f99b635c59fce SHA-1: c675dac1702455112f45bcd0cca4ad180883df89 SHA-256: d0a9ee0c8351c7aed45754210dcec533a6f58bd392322c97644f0b1f1b4092d9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. The primary attack pattern involves luring users through a deceptive link, likely leading to further malicious content or phishing attempts. The ML classifier strongly supports the malicious nature of this PDF.

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=capsa+susun+free+poker+casino+apk
    • http://files.fightingforhomeice.org/uploads/1/3/1/1/131164386/benoxoxa_vikuzifib.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/adobe_creative_cloud_trial.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/82118927651.pdf
    • https://cdn.shopify.com/s/files/1/0440/5241/4614/files/josavowojejiwitulakuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/70219317718.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/33896719609.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/sedopirovufanidasusutuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/45796809558.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/camden_county_clerk_nj_cover_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/jekefuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/91346324657.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/71115250722.pdf
    • https://cdn.shopify.com/s/files/1/0439/3543/2859/files/alaris_pump_technical_service_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613a.bin
57e0234decaaf6ad00efccef3caa36f1d184edc4d418d08e942e628c60b631f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 4864 bytes
font_01_sfnt_off000071d4.bin
e327f762cbadc43c134ca091a90b25362683926df7bf5334959aa7d9994951c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 10864 bytes
font_02_sfnt_off0000972a.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x972A 16092 bytes
font_03_sfnt_off0000abf2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABF2 4324 bytes

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