Malicious PDF — malware analysis report

Static analysis result for SHA-256 117db5a124b514d2…

MALICIOUS

PDF

40.0 KB Created: 2020-09-10 01:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01be0daa571bdb4e5072d0f571e05de9 SHA-1: 9652933121266b739e85a16d897a015341f5cddf SHA-256: 117db5a124b514d24ea6064b808cc29daddf0c19d55587670adcfbcb89bf5e1e
154 Risk Score

Malware Insights

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

The PDF contains a lure related to an 'engineering drawing handbook' and embeds a link that redirects to a known malicious domain. This suggests a phishing or scam attempt, likely delivered as an attachment. While no scripts were explicitly extracted, the PDF structure and embedded links indicate malicious intent, possibly leveraging embedded JavaScript for redirection or further actions.

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=engineering+drawing+handbook+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/sijagixidilazezoruzimim.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/cadillacs_and_dinosaurs_android_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9991/files/fefuberebolawab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/xofumewekanu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0376/files/72040763079.pdf
    • https://cdn.shopify.com/s/files/1/0464/5493/1624/files/board_of_directors_meeting_minutes_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/ahead_by_a_century_sheet_music.pdf
    • https://static.usrfiles.com/ugd/7dd30d_3a521dab2f0b436a82db4de5b8d8af47.pdf
    • https://static.usrfiles.com/ugd/90661f_8c231df15b6a4b968445378040b19f13.pdf
    • https://static.usrfiles.com/ugd/46a5ae_00bfe2726ce645c59c98ca23715fe84e.pdf
    • https://static.usrfiles.com/ugd/fa6f14_a933cdd87d464875b4291cf32f1adb26.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_eb9c059d5fd442fba78498bd7fe47ebc.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_off00005f9d.bin
2c6e929ffbdba8e1c302660a92bbc5ba782132fb68a0b6f24c14b35efb65aa96
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 5348 bytes
font_01_sfnt_off000071df.bin
a0f97fa2b8e5639d6ec8b4056c3763f8a41de99d4a97f29e1d3a9706640bb785
pdf-font-stream PDF embedded font (sfnt) at offset 0x71DF 9764 bytes