Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf930c64abb22ee…

MALICIOUS

PDF

37.9 KB Created: 2020-08-25 03:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed105a70a7e1ebaccce1de9be53cb5ec SHA-1: 2736373a1305dea256809b54f555c1feef868122 SHA-256: fdf930c64abb22ee79c4c5dc55ceb6caf9dc725ad1854e013c07e8ecf16fbbb3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, and another indicated a PDF link farm. The document body contains text related to 'acrylic sheet design' and includes the malicious redirector URL, suggesting a lure to a potentially harmful site or a SEO manipulation tactic.

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.cc/pify?keyword=acrylic+sheet+design+for+mandir
    • http://rejuzele.inspirednourishment.ca/uploads/1/3/2/6/132680869/kugafuge_bopamifipa.pdf
    • http://jepibon.rgbeautybodyspa.com/uploads/1/3/1/0/131070450/6c5c905.pdf
    • http://mametux.gravelroadconcerts.com/uploads/1/3/0/7/130776449/3940391.pdf
    • https://cdn.shopify.com/s/files/1/0450/4836/5214/files/addition_and_subtraction_of_polynomials.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/xibaripivupopudulowato.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/wodomagebenujudaxiwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/86073783142.pdf
    • https://cdn.shopify.com/s/files/1/0441/0382/7608/files/caxton_associates_lp_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/57060575981.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/bourdieu_forms_of_capital_explained.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/risagik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/62309787849.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/82898860345.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/laxexif.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/rpg_maker_xp_android_apk.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_off00005693.bin
3fe9f731ecdd55bdc349c9a3e93f8c93b0c2717892d138ff66c448b520a03781
pdf-font-stream PDF embedded font (sfnt) at offset 0x5693 5524 bytes
font_01_sfnt_off00006934.bin
7c642ba6dacde1545340dbb2d66fa88d168c6914adee54b78ff236fd2b7224b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 9920 bytes