Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bde5276ce0a38c…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 11:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f7396d8131a8eb9ba196d03856abf87 SHA-1: 43ffc2014b5ba0647056051dd192083a0de6d68b SHA-256: 62bde5276ce0a38cf9e52a8447a9599370a2d89929ac9232d801b94ee19f7af3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to a redirector URL. This suggests the document is likely part of an SEO spam or phishing campaign, aiming to direct users to malicious or unwanted content. The presence of numerous links, including one to a known malicious redirector, strongly indicates a malicious intent.

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/wix?keyword=breville+slow+cooker+recipes+lamb+sh
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/cuisinart_vanilla_ice_cream_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/letonuginifijo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/musescore_flute_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/adenomas_hipofisarios_funcionantes.pdf
    • https://cdn.shopify.com/s/files/1/0440/0224/6814/files/zebrafish_brain_atlas.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/74477434554.pdf
    • https://static.usrfiles.com/ugd/de60da_e9a92e55bacb4a3da8dcdfa11b6a1afe.pdf
    • https://static.usrfiles.com/ugd/cc089a_18e75ec8fe034e35b2cf3b736575b18e.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_afee512e439549f69c201aad1041c5bb.pdf
    • https://cdn.shopify.com/s/files/1/0436/5628/2265/files/acls_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/affinity_water_email_address_format.pdf
    • https://cdn.shopify.com/s/files/1/0435/2848/7072/files/emesis_verb_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/wigixijipe.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_off00006f15.bin
5664f71b1c266311ec855d5c695867cd897dad275d8654a89f05c3bf5c52c9da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F15 5580 bytes
font_01_sfnt_off000081fa.bin
b00676e80c1ff58880d9f0f1df2f3967a352e47c9bef9e8f114f418c33869bd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x81FA 10144 bytes