Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1eccf323131330…

MALICIOUS

PDF

73.5 KB Created: 2020-08-23 14:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ffcc99ff71d810ab7ca21d853dadc05 SHA-1: 6300ba3d0e97dfc06e5ca66e4cdd14f4220d9d92 SHA-256: 0a1eccf3231313307d566cc52f00dc06d6046af4ac787340dfec895cbf0494f9
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=cladogram+construction+worksheet+answers`. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=cladogram+construction+worksheet+answers
    • http://files.jennyharrison-author.com/uploads/1/3/2/6/132683463/nonoxiwuzubododepa.pdf
    • http://files.recreatingkatie.com/uploads/1/3/1/8/131872087/kumakudim_menasivilog_ribepamuvu_xujumuvatefonas.pdf
    • http://vulub.pleis.us/uploads/1/3/1/4/131438304/guvozamuli_jupamusuzese_puwexudijarew_gozikajarox.pdf
    • http://bexare.kimsheavenlyblingbash.com/uploads/1/3/1/4/131406532/3988754.pdf
    • http://rojide.globalsteph.com/uploads/1/3/1/1/131164250/kosopopud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/futilobodilewojowivu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/fuwapetufatufewipilasedup.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/bkdrluhar_classes.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/77004546088.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/no_man_s_sky_graphics_settings.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7063/files/85576573767.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/how_to_analyze_likert_scale_data_in_spss.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/36590408199.pdf
    • https://cdn.shopify.com/s/files/1/0431/6967/7474/files/broken_age_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/fubeji.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6652/files/66069732513.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_off0000d826.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD826 2828 bytes
font_01_sfnt_off0000e220.bin
cbd7b9c2b716f41f35ab285e4029a3decd3832b269c9651da637992647d4b51a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE220 5416 bytes
font_02_sfnt_off0000f46f.bin
87dad6687052caecd078bde8a1c2587a356c14e17b63afbaf6db36f1611a7c51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 9868 bytes

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