Malicious PDF — malware analysis report

Static analysis result for SHA-256 9928800252cc0c52…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 16:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d40b4ff02aedde04b8559098ea9d04 SHA-1: 29fbf312b49af6f11562066cba07348def27bc04 SHA-256: 9928800252cc0c529eef73b83a7871b83501bb39fc0dc82fd11562a92e11ca73
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to malicious sites through a link farm, likely for phishing or malware distribution.

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=concepto+de+movimiento+rectilineo+uniforme%2528+mru%2529
    • http://files.juneauanimalrescue.org/uploads/1/3/1/8/131856166/9370879.pdf
    • http://files.eosystems.com/uploads/1/3/1/3/131379830/guguzipilew.pdf
    • http://ketije.frankkennedy.org/uploads/1/3/1/4/131437508/35f20047525fa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/29708870236.pdf
    • https://cdn.shopify.com/s/files/1/0434/1284/8807/files/viral_conjunctivitis_patient_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2247/files/wonetevowetoxade.pdf
    • https://cdn.shopify.com/s/files/1/0438/0069/0848/files/85283744472.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/taresarolezemaxurikipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/bodopalelobubedas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0997/4169/files/pantone_pms_color_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/7891/0106/files/conowingo_dam_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/capsa_susun_mod_apk_2019.pdf
    • https://cdn.shopify.com/s/files/1/0436/9897/8971/files/6th_grade_spelling_words_k12reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/sufasen.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_off000057c0.bin
93d027cf4574beaabf1b7e14902a628c408f9ddec1decc10596b994e183eefa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C0 5032 bytes
font_01_sfnt_off000068d8.bin
5579607a51e5b9e888d8f0b61d25384294456f08d08f71b5787b991734031735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 14424 bytes

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