Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba594bb6d55900e…

MALICIOUS

PDF

71.5 KB Created: 2020-08-13 23:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09e99e883f63254eb07f3771751a5ef1 SHA-1: 3562325057da04762c0a560938c049f24d69db73 SHA-256: dba594bb6d55900e87b11040d9ff7cd93751e97ea59da6b0586edb70dd218e01
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.ru' which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL and keywords related to software downloads, suggesting a phishing or malware distribution lure. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm designed to attract traffic and potentially distribute malware.

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=eclipse++free+for+windows+8.+1
    • http://files.gallantsbiocorner.com/uploads/1/3/1/4/131407974/cf2ac91695c48.pdf
    • http://jevirax.monkeymadnessfunbus.co.uk/uploads/1/3/1/4/131407440/7335664.pdf
    • http://files.sacredheartfc.org/uploads/1/3/2/7/132740873/b154f2ac53f4.pdf
    • https://cdn.shopify.com/s/files/1/0437/3164/8663/files/barbarian_wrath_of_the_wastes.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/zawijudiwojubanigi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/94858646408.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/69005815646.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/didelukuwiviketeduke.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/61308250762.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2828/files/sakarenusuwefinesapevi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/mepalevesebijozobive.pdf
    • https://cdn.shopify.com/s/files/1/0437/7382/1082/files/all_reactions_of_alcohols_phenols_and_ethers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/67704229039.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8563/files/belarukovu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/anthology_of_short_stories_icse.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6773/files/68830116481.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_off0000d3f4.bin
7d4df8d64c19a9c4f645ee1665cd3b7c083b3fa3cccc3f2b09a50b32f4cbf8ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F4 5264 bytes
font_01_sfnt_off0000e60c.bin
82aba7d66d8994b10da12c44606954c78602a005b0b3d722573128e4d0eabb4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 13312 bytes