Malicious PDF — malware analysis report

Static analysis result for SHA-256 05dce348a446438e…

MALICIOUS

PDF

35.6 KB Created: 2020-08-19 22:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e935bf582559adc46e2b7f8276d593b SHA-1: 271851ab463da4f6ff23eb2fdda7414fcc833eda SHA-256: 05dce348a446438ec2748a7375b990aac32a47c8fcde41184f88ecb0118e8778
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to 'https://ttraff.cc/pify?keyword=dictionary++for+windows+8.+1', indicating a malicious redirection attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous external links, including one to known malicious infrastructure, suggests the document is designed to lead the user to a compromised site or download further malware.

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=dictionary++for+windows+8.+1
    • http://files.xplanator.com/uploads/1/3/1/6/131636957/997747beb480b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/pamepanulupeguv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/pigosod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/ragabozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/core_java_and_advanced_java_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5031/files/fogaguvegofotigole.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/supekixekosesulaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/973561160.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/base_in_terminal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/23677845804.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_off00004cb6.bin
e9c4adc37871b415b0834f99c92e50b99552a953418e034b3c4b89f55c8d7e6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB6 5452 bytes
font_01_sfnt_off00005f72.bin
bce3a44bb613078c8fe269c7f0f7071b39f875023b1b52b8b01096259ab7808d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F72 10144 bytes