Malicious PDF — malware analysis report

Static analysis result for SHA-256 244c046304fb0d83…

MALICIOUS

PDF

45.0 KB Created: 2020-08-12 19:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd26f6c8d4c1c0fbf78fa9922de63b04 SHA-1: d3bf53a7cbb117199a8a008b10bd989d35e7edbd SHA-256: 244c046304fb0d836283d271a11f7cd8837913227073ec8dac2888349396d590
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to manipulate search engine results, leading to a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=ap+biology+learning+objectives+pdf, which is part of a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and numerous other links hosted on cdn.shopify.com, likely intended to appear legitimate.

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.com/pify?keyword=ap+biology+learning+objectives+pdf
    • http://files.njpacci.org/uploads/1/3/1/1/131163898/vinenas.pdf
    • http://garisum.plymouthfirstsaturdays.com/uploads/1/3/1/6/131606758/tedolujef.pdf
    • http://files.nepalrvt.org/uploads/1/3/1/0/131069934/wabenokuxaxaz_wisisureb_jelevufiw_gurowaso.pdf
    • http://pibojolol.qristara.com/uploads/1/3/0/7/130775826/limusakuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/burda_magazine_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/riromekekepusegivepizazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/39033833376.pdf
    • https://cdn.shopify.com/s/files/1/0447/4172/2263/files/puduviwotowoxonez.pdf
    • https://cdn.shopify.com/s/files/1/0447/3402/1788/files/pictureka_card_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/mokuxeserujew.pdf
    • https://cdn.shopify.com/s/files/1/0450/5174/0310/files/bm_hunter_icy_veins.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/91723376871.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/58619166314.pdf
    • https://cdn.shopify.com/s/files/1/0433/7241/3079/files/definicion_de_actitudes_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/gepaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/6432/6299/files/98713789597.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/86921013338.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52135332303.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_off00006feb.bin
5f3c4243b2acbc6064e5cba03d1067523d4487ebf3c573a9a55b9dad514ffacf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 5688 bytes
font_01_sfnt_off00008354.bin
9685e2841215a2c33e6b83198b9e264db0873fa9d6ec7fc5c140321e700b000e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8354 10304 bytes

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