Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffe28509864364a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-31 09:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c089f2e2e57c0132258731d315b9f811 SHA-1: 4f6dbe93308da412071cf88690338ec61baafd04 SHA-256: 8ffe28509864364a947448db9c2b25fb5c0eb9d30333fe10ce23880d4de3a8d6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains the same URL and references a contract template, suggesting a phishing or scam lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious destination.

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.ru/wix?keyword=formato+contrato+de+cesion+de+derechos
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/67211733254.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/bisaduwobefenasifom.pdf
    • https://cdn.shopify.com/s/files/1/0448/9238/9531/files/cerebro_y_creatividad.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/biological_classification_mcq_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/14586756116.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/57646578616.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/85452792659.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/gewusituputetozeku.pdf
    • https://cdn.shopify.com/s/files/1/0463/5050/0002/files/animus_harbinger_mod_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/suremupamopim.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/52683650574.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/human_anatomy_marieb_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1277/files/kifonifapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1349/files/tiseveditesanudula.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0460/2255/7855/files/last_week_tonight_episode_guide_tv.com.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/36475807862.pdf
    • https://cdn.shopify.com/s/files/1/0459/6999/7984/files/search_chrome_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/99198658637.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_off00006db5.bin
8c44d9b5eed6d53b73ecfb8385da62f001c1fd41002038341ef82b64156badde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB5 5100 bytes
font_01_sfnt_off00007ed8.bin
e5d6bbc046cfbf594cdc0216a65609dcfe79029830f1453140d79a8b0566c732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED8 11804 bytes

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