Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f9235e3fc9871c…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 00:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21374f426945cb6c9654ba2b699960e4 SHA-1: 52607b7d9bb58c982c49baff623a6149a18d1100 SHA-256: 46f9235e3fc9871ce1daffe5d4569f8b76b21243050b9aacec7083b17bdebc76
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.cc. The document body, though partially obfuscated, contains the text 'Bereketli topraklar üzerinde pdf' and the URL that was flagged as malicious, indicating a lure to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=bereketli+topraklar+%25C3%25BCzerinde+pdf
    • http://files.hendersonbrothers.ca/uploads/1/3/0/7/130775172/3896565.pdf
    • http://files.cardiniadeer.com/uploads/1/3/1/4/131406785/8142673.pdf
    • http://files.chesterflatearthgroup.com/uploads/1/3/1/3/131398250/ad3230cde6.pdf
    • http://files.minnickmanagementhoa.com/uploads/1/3/2/6/132695546/240d4cfdf90fa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4071/9516/files/92972839582.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/gerugepuripemu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/ragedemejelaromivuzu.pdf
    • https://cdn.shopify.com/s/files/1/0444/3871/6583/files/perfiles_de_aluminio_catalogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/28396416746.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/48067221767.pdf
    • https://cdn.shopify.com/s/files/1/0440/1017/6662/files/21352174515.pdf
    • https://cdn.shopify.com/s/files/1/0438/9715/9832/files/63527552680.pdf
    • https://cdn.shopify.com/s/files/1/0431/7711/5812/files/botany_notes_for_upsc.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/83266057750.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/29729516817.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/82925861480.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_off000062f7.bin
dc9693d6a1ac4d816a8ed870820fade7c4b2d748146b7a4fa70ee191842226cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 5140 bytes
font_01_sfnt_off0000745d.bin
c8eb17c242ba2c2b94d5cf7f2980881870bb1448cb91779a7b2e3c863fc6d6c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x745D 15096 bytes