Malicious PDF — malware analysis report

Static analysis result for SHA-256 427cefcaee9a750c…

MALICIOUS

PDF

39.6 KB Created: 2020-08-22 08:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c93488eee85d687571c751810ffb16c3 SHA-1: 184486f725f34f329eb8df37eb0f1281d403daa6 SHA-256: 427cefcaee9a750c5dd13008282056537d493eff8c1e9bb040bfeeba33893094
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links, https://ttraff.cc/pify?keyword=dotted+line+report+def, points to a known malicious redirector. The document also features a large number of external PDF links, many hosted on shopify.com, suggesting a link farm or redirection strategy. The primary attack pattern involves luring the user to click on malicious links within the document.

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=dotted+line+report+def
    • http://dadip.maggiemcmuffin.com/uploads/1/3/0/8/130874598/pivovevabos.pdf
    • http://files.mylocaldetailer.com/uploads/1/3/1/6/131606035/552d3d.pdf
    • http://files.nxtcodehelp.com/uploads/1/3/0/7/130739570/7430763.pdf
    • http://nerawuke.stemstudentinfo.com/uploads/1/3/1/4/131454029/5458825.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/33746109552.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/jojiruvabowazuwinefiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/43510398401.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8673/files/pisekufububux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/prentice_hall_chemistry_2008.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/math_101_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2714/files/33481342696.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5559/files/xulajizenevofivowuweg.pdf
    • https://cdn.shopify.com/s/files/1/0433/9377/7827/files/18638307620.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/panasebo.pdf
    • https://cdn.shopify.com/s/files/1/0450/0904/3606/files/understanding_pathophysiology_huether.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/63509027222.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_off00005f6e.bin
b9222cb4fe9b1c20362e50247494a65deb708456470a1a4fe5c3bad3c1eddfe0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6E 4644 bytes
font_01_sfnt_off00006f4c.bin
441e86831b92e4066d41d237a41952b9ec5a22e181b34836d976352a29b0cbb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 10140 bytes