Malicious PDF — malware analysis report

Static analysis result for SHA-256 65915c90b9ba1597…

MALICIOUS

PDF

46.6 KB Created: 2020-08-23 08:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 822ccce086c9e2eaa75c273dcaf48584 SHA-1: 9eacd7afe9c071a0efc9c6e02d7a783742ddf0fe SHA-256: 65915c90b9ba15970e1fd4371a0301776c8b00ed5bb241d8e895725152b65051
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, masquerading as a legitimate application download. The embedded URL `https://ttraff.ru/pify?keyword=hp+smart+app++for+windows+10` is a critical finding, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction via embedded links.

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=hp+smart+app++for+windows+10
    • http://lagok.linkroland.com/uploads/1/3/0/9/130969972/lasitopor_fakadavuti.pdf
    • http://ruvubo.rusticfencephotography.com/uploads/1/3/1/3/131383544/simekibu-xigakesum.pdf
    • http://files.itslynnykansas.com/uploads/1/3/1/3/131398125/2850522.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/85398639888.pdf
    • https://cdn.shopify.com/s/files/1/0448/4674/3709/files/dirufubetuxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/tatufefemukezer.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/93191466131.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/5000/files/xanewudobilikuvuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/mevinotatowoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/13913560127.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/correct_buzzer_sound_effect_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/6125/5073/files/biology_class_12_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/vasuwupudibamotoronerijuf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077ea.bin
1e0336cfb77c7bf6e8595d3b4adc43229b2da4cf52096345a6879e588615ef61
pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 5404 bytes
font_01_sfnt_off00008a3a.bin
4f21614dad8301f031c24355289c0132ffb8466a473cb19357c6e23bcf6b3156
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3A 10376 bytes