Malicious PDF — malware analysis report

Static analysis result for SHA-256 08221081ecf02e7b…

MALICIOUS

PDF

40.5 KB Created: 2020-08-15 08:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 153f6287829e705ac6adbee898156abf SHA-1: 7726ca0705377654e4c473fe2098dd8d530d43a9 SHA-256: 08221081ecf02e7bc2d2289cf7b6eee3cd9c9bbb11420d5cfdfc63b8caba4c83
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of links to external PDFs, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' lure further supports a phishing or scamming intent. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to a second-stage payload or phishing page.

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.com/pify?keyword=online+code+formatter+javascript
    • http://files.endgamefit.com/uploads/1/3/2/7/132712000/pumadujedowi-zavixawirepub.pdf
    • http://files.dididothat.net/uploads/1/3/1/4/131453821/0a9dd5887455.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/autobiography_of_a_yogi_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/63998493097.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/pilavesogomovu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/32736005439.pdf
    • https://cdn.shopify.com/s/files/1/0437/0182/9797/files/negutexademulesalamak.pdf
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/hard_spelling_bee_words_for_college_students.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/fitusojibigunaxuleveketi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8710/9023/files/ridavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/mivekemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/encyclopaedia_eorzea_compressed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27347714529.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_off000059c6.bin
eae361adb9a2389188062f768783462711c93c723bcb852c7eb9ea2df3b001cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C6 5464 bytes
font_01_sfnt_off00006c4b.bin
a2cbeae89c5a4cb0e6440473e3d0057fddc796e9f5740c07aa59fce1cd65612d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4B 12780 bytes

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