Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e6ffd6decbd814…

MALICIOUS

PDF

53.4 KB Created: 2020-08-15 02:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2237df5cc4e3fcbe829594fb16858e57 SHA-1: 60d200de9eadcb13cdde8dd96f0b94774693726c SHA-256: 85e6ffd6decbd814372e1fee3e963d3644ca050b35d919156120dac803c78d62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to malicious infrastructure, specifically `https://ttraff.com/pify?keyword=gloomhaven+class+guide+sun`. This URL is part of a link farm designed to manipulate search engine results and lure unsuspecting users. The document body, though heavily obfuscated, contains references to the same redirector URL and benign-looking Shopify URLs, likely as a distraction. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=gloomhaven+class+guide+sun
    • http://pipoturoj.southerncountrykennels.com/uploads/1/3/2/6/132695328/korejebuxuzafid.pdf
    • https://cdn.shopify.com/s/files/1/0435/9723/4338/files/80703307820.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/cambridge_oral_placement_test.pdf
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/water_bacteriology.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/14517441234.pdf
    • https://cdn.shopify.com/s/files/1/0429/7293/8399/files/zajarad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/47746758298.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/46578359398.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/jorotidimex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/59831142049.pdf
    • https://cdn.shopify.com/s/files/1/0433/8437/3406/files/more_than_words_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0436/4818/8569/files/gubosijorojev.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_off00009403.bin
52d22755b2f9afaccfdbe7342161401aa7ac11cdeb5380e350a22196d6e639cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x9403 5348 bytes
font_01_sfnt_off0000a616.bin
a2967cbe5440e145b63422f5257d9c9ae5533b6d737bc3b1876d849b049dcbe4
pdf-font-stream PDF embedded font (sfnt) at offset 0xA616 10096 bytes