Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fe1ba87b849002…

MALICIOUS

PDF

85.1 KB Created: 2020-08-15 22:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ae15057949da86c3cffbb4b0d53828f SHA-1: 1310dffe336958d94b9c0aced6971935f318a16b SHA-256: 07fe1ba87b8490025b34572c150afef1565422963c9b8db5e716add849647b5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of this document being used to distribute malicious content or phish users. The ML classifier also strongly flagged this sample as malicious. No scripts were extracted, but the embedded links are the primary threat vector.

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.ru/wb?keyword=anthony%20giddens%20sociology%20pdf
    • http://files.camillasamengo.co.uk/uploads/1/3/1/8/131856173/kuwepukadoluwubogoro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/resenener.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/mizeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/naming_acids_and_bases_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6481/8838/files/beware_the_dog_roald_dahl.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/55003055965.pdf
    • https://cdn.shopify.com/s/files/1/0435/8792/8223/files/kibituzuwinovepovopub.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/dobuzego.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/aadhar_card_online_password.pdf
    • https://cdn.shopify.com/s/files/1/0436/6116/4697/files/dovek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6689/files/85075466432.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/you_ain_t_seen_nothing_yet_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/catia_v5_tutorial_for_beginners_free_download.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_off000110ca.bin
3b0a73951d7f3f9b8432653f9fb9ce48e9b7112ef77a9e9ca0d25e092721b3f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x110CA 5200 bytes
font_01_sfnt_off0001228d.bin
c3e94b57ea8e89f8c01486b2dac9008d5381fac8541a393b700586b6559acfac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1228D 10936 bytes