Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0035efb839f9fc7…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 23:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5cee290b92112c15ff73b9f1724a7ba SHA-1: a81da9057c88e6a11229df35b96eb0078c73c7de SHA-256: d0035efb839f9fc72e4d2e0224a55ff401db48753563403500d8bb3b223305ba
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a malicious redirector link pointing to 'ttraff.ru', and another identified a PDF link farm hosted on 'cdn.shopify.com' and other domains. The document body contains text related to 'Mandalas pdf zum ausdrucken' and mentions 'wkhtmltopdf', suggesting a lure to download or view content, which is then used to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wb?keyword=mandalas%20pdf%20zum%20ausdrucken
    • http://pafodak.balancedbodysolutionsok.com/uploads/1/3/0/7/130775432/75385843d0b9323.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/cloudformation_iam_role.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4847/files/prezi_en_el_ambito_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/pdf_encyclopedia_of_general_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/as350_b3_flight_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/b._m._hegde_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/11757677123.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/15717500220.pdf
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/fixug.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/xapibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/53289912599.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/56567139438.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/let_s_eat_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/all_human_body_systems_and_their_functions.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_off00006070.bin
34cdd16b0e326b2fd3f6cee4e8fdebde9ec6e3e267c315a16eb7bf833abdd5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6070 5420 bytes
font_01_sfnt_off000072d5.bin
473ae3bb4af8718c7d88e79e0f13e5897ba2bcf4da88940af0f2026488fb6a5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D5 10892 bytes

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