Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd23a653a6319a7…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 01:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db7f7481988b30d1aefb4f6247b40c62 SHA-1: 734758e060991af83ef9285b4ac439efc4180936 SHA-256: 3fd23a653a6319a7b67deecaaebc685da061e209d7ba5abbd3d54f1313493d94
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented to the user as a D-Link router manual. This indicates a phishing or scam attempt to redirect users to malicious infrastructure.

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=dlink+dir655+manual
    • http://files.alabamatransportation.org/uploads/1/3/2/8/132815767/2527730.pdf
    • http://files.thewarriorsrosary.com/uploads/1/3/0/7/130739060/jatibuferixiv.pdf
    • http://files.stellarendurance.us/uploads/1/3/1/4/131410094/tududakup-wexitoso-livalulunubor-tamab.pdf
    • http://files.rochesterschoolsfoundation.org/uploads/1/3/2/7/132710694/soporejipi.pdf
    • http://files.patriciagodden.com/uploads/1/3/1/4/131483019/5adf2.pdf
    • https://cdn.shopify.com/s/files/1/0435/4578/8584/files/sigiboxafunaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0910/4279/files/xulebuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6743/files/89988541409.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1767/files/lsat_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/html_unordered_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/81577370520.pdf
    • https://cdn.shopify.com/s/files/1/0428/8993/7055/files/printable_calendar_2015.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/74280348550.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/nodefexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/148255054.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/kanodawazinalova.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/74614914470.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0460/files/pirelabuxixagul.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_off0000604b.bin
fe79a6648fb92529c7a91f430150611bde111a54853e545405db64d3cb4c737f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 5136 bytes
font_01_sfnt_off000071b2.bin
d1bf5a11bfafe678d5e39fd51cbfa6efaa5e47318eb52a010ac0bcb65e49a00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B2 10032 bytes

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