Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f469aa94badd56e…

MALICIOUS

PDF

45.6 KB Created: 2020-08-20 01:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3963089683e5a2fe72de826d1e777c58 SHA-1: 3b47f0dc2be31819de5d3e5fbb1250c0620d8654 SHA-256: 4f469aa94badd56efb9f5b9f4f4064c22c3e5b9da8bc4d8d15d2eadbc82338db
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=nct+127+cherry+bomb+english. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The presence of many other Shopify links indicates a potential link farm or SEO poisoning attempt to mask the malicious destination.

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=nct+127+cherry+bomb+english
    • http://files.cloudhauz.com/uploads/1/3/2/8/132815752/wajerivege.pdf
    • http://files.footprintspodiatry.co.nz/uploads/1/3/0/7/130740130/puginojavab.pdf
    • http://files.lesdamesdc.org/uploads/1/3/0/7/130775753/putibosumovajim.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3910/files/76348485421.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/96235910218.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/60194266101.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/42514645883.pdf
    • https://cdn.shopify.com/s/files/1/0448/9995/8939/files/magic_item_table.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/xaseketamekixusupawuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/88544224709.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/herbal_encyclopedia_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/49828614234.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000573f.bin
1fe40d71df03a0562227b4e613a0f305e1880501a702481bc3c59c18f862c04d
pdf-font-stream PDF embedded font (sfnt) at offset 0x573F 4128 bytes
font_01_sfnt_off000065d9.bin
aceee53e8c69c289c6a8d053355e9d8cf3d890b708d5b77a5b73456f08ec6568
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D9 5268 bytes
font_02_sfnt_off000077ac.bin
b742f3949315447bdc531cea1977761f401097dcace895f663a59ba779d669df
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AC 9972 bytes
font_03_sfnt_off000099e2.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x99E2 4324 bytes