Malicious PDF — malware analysis report

Static analysis result for SHA-256 3193c46fe66378e1…

MALICIOUS

PDF

45.7 KB Created: 2020-07-29 20:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7c257d438701dea1aa5d2fa9aca5ad7 SHA-1: 37561e419ba9ad29115ab3bade2cc0415ef3cb83 SHA-256: 3193c46fe66378e152b2ff44c3ac7df83e83feccdc318525cc1a439659d52bc5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click on these links, which likely leads to a phishing page or malware download. No scripts were extracted, limiting the analysis of direct payload execution.

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=am%25C3%25A9lioration+continue+production+pdf
    • http://files.ahgroupjo.com/uploads/1/3/1/3/131382808/liveg_vazolotote_bulikasuxakuk.pdf
    • http://files.dermawand.greatwebsitebuilder.com/uploads/1/3/1/3/131384300/bumosod.pdf
    • http://files.eevcom-montpellier.com/uploads/1/3/1/8/131856121/7336076.pdf
    • http://files.eriksbracelets.com/uploads/1/3/1/6/131637056/nokavagijir-bewodepabile-dexuge.pdf
    • https://cdn.shopify.com/s/files/1/0434/8225/1421/files/70504336578.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/79719331658.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/korodikasitamazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/majusotogozarow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/39803333354.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/55968340181.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/19882681505.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/tonazonuzivateta.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/vovev.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/nekezokolotikutibitize.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_off00006f8e.bin
d0158f7c2fd913cef7355c330e8fdef5bca9031c0b91a9c0b869698e73b21153
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8E 5136 bytes
font_01_sfnt_off0000809c.bin
9d0cbe3f07c54454cbbe3454a235ae3073e222effcfbc2efd0cac7acf93560d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x809C 12444 bytes