Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1dfa0ce5d0d8bd1…

MALICIOUS

PDF

63.8 KB Created: 2020-08-25 19:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b76cec54767f6bddada64451f61db8d8 SHA-1: 4ae1353f1e1f312c52337f3f1e1870cc25314f13 SHA-256: f1dfa0ce5d0d8bd1a262c4b5862b1b2d9eab3cc95208dda335d1fef0d82d5886
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to an 'algebra 1 chapter 5 assessment book' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=algebra+1+chapter+5+assessment+book
    • http://files.spartanleadershipgroup.com/uploads/1/3/1/3/131379899/47c1cb.pdf
    • http://sifufepof.mahakaitreasures.com/uploads/1/3/1/3/131381241/vakozekurame_mukale_kafam_libuwasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/12920779146.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/38445985452.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/72975400919.pdf
    • https://cdn.shopify.com/s/files/1/0430/2215/5930/files/gakuliguxazapidelifij.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/fapaxixox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3710/6087/files/yamma_yamma_kadhal_ponnamma_audio_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/43506940811.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5713/files/3560340492.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18396470220.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/birth_by_sleep_abilities_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/ruzasotevuruvivoxojife.pdf
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/treatment_of_acute_myocardial_infarction.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_off0000b982.bin
7d611959deac5fe1e5c29e17c160190b7d94a806c8838571619a502f3d2fde0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB982 5716 bytes
font_01_sfnt_off0000ccdb.bin
3b3f3950ab262b74f035d4ef81e349d231620e93c1bf5a309592a31813741a00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDB 10932 bytes

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