Malicious PDF — malware analysis report

Static analysis result for SHA-256 6426b4bae89d0a4d…

MALICIOUS

PDF

46.1 KB Created: 2020-08-14 06:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1ea7a6dc771476f990160b7ab0e16cd SHA-1: 872173ff88404a590415974b021ad581353cfe15 SHA-256: 6426b4bae89d0a4d7260983cc6562247a5e169a6a64aafc01aaad21e6ffcda65
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Hd wallpapers 1080p for pc' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of many external PDF links further indicates a link farm or distribution mechanism.

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=hd+wallpapers+1080p+for+pc
    • http://redosejuz.ekamniearth.com/uploads/1/3/1/3/131398020/zobizabur_lofexidupo.pdf
    • http://lumuvinoj.thomaspatrickryan.com/uploads/1/3/1/0/131070161/d35bba3d7727.pdf
    • http://files.joshuablehman.com/uploads/1/3/0/7/130775249/gewupejametu-savimazebewuli-dupiwi-xaxavab.pdf
    • http://wixuli.cliftbuildingslc.com/uploads/1/3/1/3/131380284/zedofolosudolojesav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9308/9692/files/betarava.pdf
    • https://cdn.shopify.com/s/files/1/0438/2811/7661/files/preparazione_al_celi_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1389/files/unix_shell_script_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/95326684597.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9890/files/stomatitis_aftosa_rekuren_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/4587/8941/files/31588622128.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/definition_of_creative_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/types_of_advertising_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/63869601073.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/galactic_starveyors_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5831/files/africa_twin_2020_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7347/files/45892747680.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/25123468641.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/present_tense_practice.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_off00007477.bin
e682446c4d68cb9c995b3b5d521fe2d1bda77c46b136aef198d9e998b1523a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 5592 bytes
font_01_sfnt_off0000879b.bin
7b991a677aab33715d52f3716ef9b2017b8ed4274bc3f663a82258ba88970da8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 10292 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.