Malicious PDF — malware analysis report

Static analysis result for SHA-256 474ed674f16e9fe5…

MALICIOUS

PDF

43.8 KB Created: 2020-08-11 08:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca636292fe5dbfe69eb54e1fb6bb7d22 SHA-1: f0e9d918bba1a7499b493aacc19a304e48786230 SHA-256: 474ed674f16e9fe5938daa21b3e1939294cc48acde6ac7964ea1b8ad1f50bec4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains the URL `https://ttraff.com/pify?keyword=how+to+add+value+to+yourself+pdf`, suggesting a lure to a phishing or malware distribution site. The presence of many Shopify links, some benign and some unknown, indicates a link farm strategy to obscure the malicious destination. 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=how+to+add+value+to+yourself+pdf
    • http://files.mrsavans.com/uploads/1/3/0/9/130969728/jamebovotemodanaw.pdf
    • http://files.hopemultipurpose.org/uploads/1/3/1/4/131453177/1649001.pdf
    • http://files.daisymaeboutiqueshop.com/uploads/1/3/1/0/131069934/bumuf-lofamoletemir-fumezikefu-gifamiwemife.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/89211225448.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/alosetron_davis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/81980540736.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/75537242267.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/jukibo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/lufodorevebaxewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/mivupoduduxamerabuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/63898752432.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/modosunetepiwogubujubiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7287/files/82213911077.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/37443207385.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/37536576451.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_off00006dfa.bin
45705a445588f195ed47d6a36b8c9b5183d7b2a3446f795fb3219ffeab159269
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 5252 bytes
font_01_sfnt_off00008001.bin
ddc96c3d25553df048cd5b868e66ac7843bdf2923083275320a39c52e9fa66a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8001 10088 bytes