Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ed8bf61636c2d0…

MALICIOUS

PDF

61.7 KB Created: 2020-08-19 05:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a96d18a1e674d1bc3d81d139eb97f8e2 SHA-1: 9632f1bfafa64aed9f3078b6b9a0b787ff4090cc SHA-256: b6ed8bf61636c2d0c9420a4c7a8a94f3da64b7407da52549bb98c69181acd945
160 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links, including a critical finding of a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to trick the user into clicking the malicious link, likely leading to a phishing page or malware download. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=asbab+al+nuzul+quran+pdf
    • http://wojexotur.indigolorae.co.uk/uploads/1/3/0/7/130738755/mewuwafifaz-newemago-toremifiwi-ribepuvokil.pdf
    • http://sunetub.tfhop.org/uploads/1/3/1/3/131380177/0682db3f6.pdf
    • http://files.mendocinofood.org/uploads/1/3/1/4/131453615/gamedip_xepone_nokaloluzi_buwibetorad.pdf
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/39313288414.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/wibabiperofo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/resting_membrane_potential_and_action_potential.pdf
    • https://cdn.shopify.com/s/files/1/0434/2244/9814/files/81160748605.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/jarurinofowemujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/nelizuwosufexalejinutulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4311/9516/files/96546383558.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/sewoxefetulebotubovod.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/32396871210.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/rapidex_english_speaking_course.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/52972978684.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojedisubeweful.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099bf.bin
b721f28b0cab749203f2c543586a617e4d6d5497015edfc055240c128d5d788c
pdf-font-stream PDF embedded font (sfnt) at offset 0x99BF 5340 bytes
font_01_sfnt_off0000abf0.bin
cfe128905747a9c922866db6d75e5e6a9df1859654affed31747f3aa6409797f
pdf-font-stream PDF embedded font (sfnt) at offset 0xABF0 10220 bytes
font_02_sfnt_off0000cf0d.bin
1603d80a6ffeb7dfcbd94fbe948a6241b9d8528cafbfb86acc674f9a48fc43a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0D 17656 bytes