Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8cfe924fc84888…

MALICIOUS

PDF

39.6 KB Created: 2020-08-16 21:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b9c55e02a15ab5ba72ff537f9e54203 SHA-1: ebd2d5950d5d72578e7640a0c2f6b2655144efac SHA-256: 5b8cfe924fc84888f22c7b05e00b0c0f3eec85bc122747bf310afea34789ad31
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. It also features a large number of external PDF links, many of which are benign Shopify links, but the primary malicious link is the most concerning. The document body contains obfuscated text and a URL that appears to be part of the lure. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=accounting+dictionary+free++for+pc
    • http://pibobade.trinitylutheranburlington.org/uploads/1/3/2/7/132740585/metopijabodexo.pdf
    • http://tofesi.khalillezzaik.com/uploads/1/3/1/1/131164239/db71763af8.pdf
    • http://files.apanagopoulos.com/uploads/1/3/0/7/130740013/a36accc17b8.pdf
    • http://files.bluebellegardeningservices.co.uk/uploads/1/3/1/8/131856100/460c6dc6e2b254.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/72346795731.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/14003495641.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/zentangle_pattern_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/19550709684.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/toterimisezorewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/94070235634.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/29697674710.pdf
    • https://cdn.shopify.com/s/files/1/0446/4400/8099/files/42611351802.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f5d.bin
a9ff598d844ff4f3dc3cc338bc5f0e4ac96d633fb7b3f2efed5b806fa6078064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5D 5084 bytes
font_01_sfnt_off000060bb.bin
c1673017dc9ef91ffea8407b302a960823e110c28806e33c40b8c607a84c321c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 10168 bytes
font_02_sfnt_off0000839f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x839F 4324 bytes

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