Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10d30562b897e30…

MALICIOUS

PDF

139.4 KB Created: 2020-08-02 17:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19edd6b1be0c5a19c1e85b8cdffc7e0a SHA-1: be022f3517f956a23b54f84b91311901c84a0152 SHA-256: f10d30562b897e305c4e53c90b927d1b562fd9517a9a4db96b76841e95333474
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL points to a redirector service, which is a common technique for distributing malware or conducting phishing campaigns. The document body, though heavily obfuscated, contains the same URL as the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=the+crafting+dead+mod+1.+7.+10
    • http://files.justinbarwick.com/uploads/1/3/1/4/131452922/madidugivojo-morosu-tulomobosidumog-tojubuxajalol.pdf
    • http://files.lindseyraisa.com/uploads/1/3/0/7/130775854/pekatubojon_vamosabivob.pdf
    • http://files.fosteringtogethergc.com/uploads/1/3/1/3/131398322/lizumekeloxopu_pufuxobuzuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/42739779985.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/27715797235.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/vexibafeporigo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/74384122532.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/16059253859.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/mekasifamof.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/18886859151.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/58767089175.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/ropotebukibenenaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/super_mario_64_wad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cbf0.bin
b5c1b59c2cc7334f1e734f3b72c84524962d6f50b5f9a3d8193f935c809ba0f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBF0 5480 bytes
font_01_sfnt_off0001de7c.bin
3334fa52887d1cd329bbb97ef5ed065e355daa4c9445b6d1116ac78f3ea81d56
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE7C 13344 bytes
font_02_sfnt_off0002099a.bin
6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953
pdf-font-stream PDF embedded font (sfnt) at offset 0x2099A 16064 bytes