Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a385c4a6a9fa59…

MALICIOUS

PDF

41.0 KB Created: 2020-08-18 23:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbb18e9a5b5ee25cf155052ac53cbf9 SHA-1: 0fef257da6666a0e10fd0bd319e75bed442dc2a9 SHA-256: 66a385c4a6a9fa590a8a862ff6c9d0ec6c20bbe5139ab895e85cb44cffdcfb97
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, strongly indicating a phishing or scam attempt. The embedded link 'https://ttraff.cc/pify?keyword=3ds+emulator++windows+7' is designed to trick users into downloading potentially harmful content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit user interaction for malicious purposes.

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.cc/pify?keyword=3ds+emulator++windows+7
    • http://ruwiwis.ecct1868.org/uploads/1/3/2/8/132814930/8629536.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/kizobomaxavabikum.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/nipim.pdf
    • https://cdn.shopify.com/s/files/1/0449/1591/6967/files/69807249258.pdf
    • https://cdn.shopify.com/s/files/1/0434/6527/7605/files/38070962446.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/bewazozuguxezofozod.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/10th_new_syllabus_sura_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/28103705638.pdf
    • https://cdn.shopify.com/s/files/1/0434/0206/8131/files/mifawukinikenesa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4142/1472/files/total_conquest_apk_obb.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/sadizine.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/xejogisorinejimetogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/foluvodiresuredu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062cd.bin
0c485cbde411b1c7a0aeb2f7c4ce6e8158cb127414a370e7ba970cf50ab64372
pdf-font-stream PDF embedded font (sfnt) at offset 0x62CD 5212 bytes
font_01_sfnt_off00007483.bin
5a8a61d4b0c3f6152210c1bbea573b65967b397da2cf22073eeda9b333f917fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7483 10288 bytes