Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f22e62403abe89…

MALICIOUS

PDF

43.6 KB Created: 2020-08-28 01:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcb89ccc9a46133e0fabeab3e9022234 SHA-1: 1eec01cd9b7c984e61060d0880ca71fe0a1564e9 SHA-256: 18f22e62403abe89bce3236cf19c82ccb26fea4057d67868a043772cc9273313
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.club/pify?keyword=bald+eagle+drawing, which is flagged as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or direct users to malicious content.

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.club/pify?keyword=bald+eagle+drawing
    • http://files.denisegrobbelaar.com/uploads/1/3/0/7/130775588/fowujakusibafa.pdf
    • http://rinoxi.delzoactive.com/uploads/1/3/0/7/130739811/tiwilasipilurojisu.pdf
    • http://veroxa.ernst-arch.com/uploads/1/3/0/7/130776132/b881083659.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/43796741991.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5829/files/bedenofanepirasevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/66126995124.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/tizavadolonuxanofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/although_even_though_however.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0160/files/wuduluwutoxevolata.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0725/files/zanagukapugapab.pdf
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/game_of_thrones_2.sezon_3.blm_dizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/arkham_asylum_riddles_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/7525419307.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef0.bin
3755bef43e9ffd0f585001ad03cac8ab20864601f8a69ba8b665233cf0dd5a03
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF0 4956 bytes
font_01_sfnt_off00007fe4.bin
9717956ea61b4b1dde660f5a5c6f616d7c068aae33ec7aba0db60388a99f711a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE4 10100 bytes