Malicious PDF — malware analysis report

Static analysis result for SHA-256 d407cd657b406a3a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 20:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 294317edb01ef55f5688cc1dc946040d SHA-1: e30fc61de8d008714e9a9133de58f0c326731d4a SHA-256: d407cd657b406a3ad9d11e985ed7d26da82ca0a1c1f7e45185f2841446830314
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to the redirector's URL, suggesting a lure. The presence of numerous links, including those hosted on cdn.shopify.com, indicates a link farm designed to obscure the ultimate 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=funny+answers+to+are+you+alive
    • http://gosizo.fritzcornmaze.com/uploads/1/3/2/7/132740424/3963308.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/julebijosiguledezefamexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/mastering_elliott_wave_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/xotugupifofujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/10875549306.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/xutiwuzas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1167/8114/files/53400375954.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/vernier_callipers_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8063/8879/files/chemistry_formula_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8902/files/arabic_ocr_from.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/movudawalixamikubitik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/the_very_hungry_caterpillar_book_printable.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_off0000630e.bin
615265113d35b45006fefe2486892b0a19930719f63a4958c14c5169fd455cb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 4888 bytes
font_01_sfnt_off000073de.bin
1102fcfcec0ba608688bce5bcd9824b128a5a082f95b1efb67055ef05680a06b
pdf-font-stream PDF embedded font (sfnt) at offset 0x73DE 10072 bytes