Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0d89db38c36564…

MALICIOUS

PDF

48.3 KB Created: 2020-08-19 19:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e082f66cd3b90e47314774ad97a13311 SHA-1: 7fe71953d3f1e45480f687ce81220ba232f2ddfc SHA-256: fa0d89db38c3656485fb7cf842155e26fce790f1ca95f253aa70a200531929bb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body itself is heavily obfuscated but contains the same redirector URL and a large number of other URLs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, and the PDF redirector heuristic confirms the presence of malicious links.

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.ru/pify?keyword=nifi+templates+import
    • http://lijuto.concordneuropsych.com/uploads/1/3/2/7/132740405/lojidigodeze_kuripaxemesep.pdf
    • http://zixute.progressivepb.org/uploads/1/3/0/7/130739232/4040230.pdf
    • http://luliz.primrosehillevents.com/uploads/1/3/1/3/131379578/wijapagu-sudogu.pdf
    • http://files.learnarmenianonline.com/uploads/1/3/1/3/131379830/jolesowurenet-minararakaz-mesumexevo.pdf
    • http://piwaxik.hotelsomando.com/uploads/1/3/1/4/131407995/8e8b5f377a9.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/17519203903.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/mujokipapimarubomobij.pdf
    • https://cdn.shopify.com/s/files/1/0434/4938/5110/files/witcher_3_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/autoresponder_madness_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/30345866591.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/nms_rare_metal_element.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/rudisimenugawaveritofot.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3149/files/dodavezazisowos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/ribitemiroja.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/35156437973.pdf
    • https://cdn.shopify.com/s/files/1/0454/0334/0968/files/michigan_alcohol_screening_test_spanish_version.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/angular_4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/kakasaderevebinenolap.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_off00006705.bin
6f2c71c9ac09349cdf912092f90ffd6095e54d87e89e5e138e795fdc72340c30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 4700 bytes
font_01_sfnt_off000076f5.bin
ac15322e2f99a4a05f136ca5fdffd6535bc9254151e2ee5fb1f2b33f8e496d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F5 15016 bytes
font_02_sfnt_off0000a630.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA630 4324 bytes

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