Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ade8304b56abd33…

MALICIOUS

PDF

47.7 KB Created: 2020-08-22 05:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 448271f07f09a6b0f15099252e0c8a4a SHA-1: 91431ea370306eb30b6c433768ce1a0691795fcf SHA-256: 5ade8304b56abd3323261fb6eea6912bb37fadbcaca7b83a86baa2bd4bca8a71
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=addy+nagar+ishq+ka+raja`. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the structure and embedded URLs point towards a malicious document designed to redirect users to harmful content.

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=addy+nagar+ishq+ka+raja
    • http://files.en.imural.ca/uploads/1/3/2/7/132711947/50b1db9c347a48.pdf
    • http://xorisab.southernswineandbeards.com/uploads/1/3/0/8/130813710/zagesasas-kajugoniwodoxo-wefinen.pdf
    • http://files.agsafetyweek.ca/uploads/1/3/1/4/131454090/rigexu-ginebulawo-nupezaxufus.pdf
    • http://files.karrathacaravanpark.com.au/uploads/1/3/0/9/130969364/d149b0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0437/8922/2045/files/wifumazavegobo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/26720377360.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/muzepogaduziludotunisas.pdf
    • https://cdn.shopify.com/s/files/1/0461/9540/9054/files/play_store_not_ing_apps_over_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/da_form_5841.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/gifedipatizebinufigiro.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/android_10_xiaomi_redmi_note_8_pro.pdf
    • https://cdn.shopify.com/s/files/1/0435/9674/2815/files/gureguf.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/pobokoninosadexobiduw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/shimura_introduction_to_the_arithmetic_theory_of_automorphic_functions.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/doxipifagetirujikawi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3390/9665/files/wilanadamizar.pdf
    • https://cdn.shopify.com/s/files/1/0440/1453/4806/files/canon_eos_utility_2._14.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/vujowog.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_off0000615a.bin
3c2185b6ed20508a78d59bb30c153fea9f646d6f74774db05830b41ab8950390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615A 5412 bytes
font_01_sfnt_off000073c0.bin
820ee4a395d4876f603edc78b0d17a777bb3752614bf4e2de23ca20dcb261805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 15212 bytes
font_02_sfnt_off0000a33d.bin
2859d0d0747b10e04506059ed11fa5ffe8c79e1d7f57860d74a7c1140c88079a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA33D 3056 bytes

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