Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf889202c009b8be…

MALICIOUS

PDF

50.0 KB Created: 2020-08-04 23:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ab9f22ab9afa894a19d0e5b1aa8c125 SHA-1: 6b12e86ed6a64e1d6b3cfcd9f145ff934f81e86c SHA-256: cf889202c009b8be1dbfc454f5771e5f248ae277b5b0d939d73d6cea7b60f9a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a deceptive document body masquerading as IELTS speaking topics, which is a common lure for phishing or malware distribution. It embeds numerous links, including a critical redirector link to 'ttraff.com', indicating an attempt to lead users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and traffic to potentially harmful sites.

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.com/pify?keyword=ielts+speaking+topics+2020+may+to+august+pdf
    • http://files.hethermilane.com/uploads/1/3/1/4/131453735/sorumenudoboxasugilo.pdf
    • http://files.oakislandhomeowners.org/uploads/1/3/2/6/132695351/denoloninanupe.pdf
    • http://files.behavioralcompassgroup.com/uploads/1/3/1/4/131453818/raremez.pdf
    • http://files.cronfaglyndwr.cymru/uploads/1/3/0/7/130739072/nibiripuno_raxitawo_mofaxiduwag_wifowukom.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/62767515635.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6032/files/fuvivopezomirowax.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/19871010585.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/pdf_biology_class_11_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6208/files/plastic_memories_episode_1_gogoanime.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/15357527457.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/wujafe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/71887872818.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/10369895067.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/71208413031.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_off000083d6.bin
1f406b8750ef67559eafa5a75918344b5f22a09a26643d08a9e9cad5b6549de4
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D6 5756 bytes
font_01_sfnt_off00009778.bin
91dd5ec96cea370ae0a84c20fbb340d06a26640320e93ecd8a04357a80df467a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9778 10296 bytes