Malicious PDF — malware analysis report

Static analysis result for SHA-256 1633119dfc6a77c3…

MALICIOUS

PDF

43.2 KB Created: 2020-08-08 08:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2eeb0a1a4e7a49301a332eb7320ac704 SHA-1: 3f336bc10ea64364e4d3d9e49f2584ca5e33af15 SHA-256: 1633119dfc6a77c32cf3525b2b826fb681ccbe8a9cf2f0c58b82384b4dbc98ec
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector service, disguised as a legitimate application download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. The document body and embedded links suggest a phishing attempt to trick users into downloading potentially malicious software or visiting further compromised sites.

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=adobe+pdf+editor+app
    • http://files.chicagocloud9limo.com/uploads/1/3/1/8/131860479/fupojobo_jevakoritumu_pekoz.pdf
    • http://files.jeenayi.com/uploads/1/3/1/4/131437603/duzifomalomojudakamo.pdf
    • http://files.rutheverett.com/uploads/1/3/0/8/130873872/metuvejega_vodiremirero_rutoruliselo.pdf
    • http://files.mgracetransitions.com/uploads/1/3/2/6/132683088/nuvoxufamesas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9065/6936/files/zakikidusawidirunobit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/beautiful_in_white_satb.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/misanemosojesuzasuga.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/skyrim_filled_grand_soul_gem_id.pdf
    • https://cdn.shopify.com/s/files/1/0428/1263/7351/files/banking_regulation_act_updated.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/sais_messina_catania_aeroporto_orari_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/49105778520.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/80573765657.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/ravivomosowigifivina.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/25015257497.pdf
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/81877856024.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_off00006a56.bin
8eebeddeb816d4f5361d622654d690b31ea50c92c97d5ae19c9d573c99562cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 4956 bytes
font_01_sfnt_off00007b3d.bin
762f80d9a62d1e2b357b6b07c1dd04f1069877604398549e80d648efa2be61cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3D 10772 bytes