Malicious PDF — malware analysis report

Static analysis result for SHA-256 196335b99080771f…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 11:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 796fd6c6fec6f4791444e207687717b6 SHA-1: d96e8fa6e1f4d87691cf700043e3251ed8973032 SHA-256: 196335b99080771fa01a311ecef819992ea3471a9dd1359aba765912291315af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the URL for the malicious redirector. This suggests the primary goal is to lure users to malicious sites, potentially for phishing or to serve further 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=creative+animated+website+templates+free
    • http://files.tinforestfarm.com/uploads/1/3/1/6/131607063/salevozezigewod.pdf
    • http://files.magiciantomanderson.com/uploads/1/3/1/3/131398128/vejinigikobe-zumitovedatiri.pdf
    • http://neruw.christcommunityonline.net/uploads/1/3/2/7/132740478/6590155.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/75079345809.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/la_jolla_zip_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/nilakodakugupidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/92839950432.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/mokataguxapekixakazew.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/silakezuxit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/french_alphabets_pronunciation_audio_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/kujinexulatikovenokito.pdf
    • https://cdn.shopify.com/s/files/1/0434/0373/9294/files/81163864472.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/present_and_past_tenses_exercises_with_answers.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006306.bin
0316a1922640f5c353e7ace8246ae5396478871d38af251ead06d0cc7b386911
pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 5384 bytes
font_01_sfnt_off00007541.bin
72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993
pdf-font-stream PDF embedded font (sfnt) at offset 0x7541 2268 bytes
font_02_sfnt_off00007f53.bin
5e8f1fa352b03dbbcd5f075754b60c77c9a5aa1148b2fcea3320c0928dc6d887
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F53 10132 bytes