Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74dce1b73ef759d…

MALICIOUS

PDF

38.5 KB Created: 2020-08-27 23:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 225d8b5dc953e09ec747e7c2d2fa592a SHA-1: 1dc77f008740a60ba53a0ddc179faf051f56ae58 SHA-256: d74dce1b73ef759d38898300e5938e42943eb229d33ec8d9aa95a4de9289f98b
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com', identified as a malicious redirector. The document body and heuristics indicate a lure related to an 'Icloud generator'. Additionally, the PDF hosts a large number of external links, many pointing to Shopify domains, which is characteristic of SEO poisoning or link farm techniques. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=icloud+generator+3.2.1
    • http://fosiluro.oconnorsmusic.net/uploads/1/3/0/7/130739732/ziresivujofi.pdf
    • http://wonizir.marinarena.com/uploads/1/3/0/8/130874153/3415017.pdf
    • http://files.duke-consult.com/uploads/1/3/1/6/131637016/penin-kutasu-nuluvur.pdf
    • https://cdn.shopify.com/s/files/1/0447/5250/2935/files/disefobudubatetawitenela.pdf
    • https://cdn.shopify.com/s/files/1/0440/0594/9590/files/free_to_word_converter_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0465/5012/2654/files/manual_de_vacunacin_2017_secretaria.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/readworks_answers_key_the_national_guard.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/ableton_live_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3369/files/xotig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/24392386600.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1954/files/21605026084.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/sozopaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/riverside_food_handlers_card.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/xadipiborodoxudezazibenan.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/nuwaromopavubosus.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/6094339530.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_off0000585d.bin
380af043da1a1e325998436eb45fbbab6be279e491998729cba64fa3e342fce8
pdf-font-stream PDF embedded font (sfnt) at offset 0x585D 5248 bytes
font_01_sfnt_off00006a40.bin
03bebc48a51b6c18526cda2a24c7d41a30fa759f54c619ec290e5d7e87b3f191
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A40 10520 bytes