Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f75e78b02b8e57d…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 05:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5fd3b19531b3e1edbd5834cc88dac67 SHA-1: b5e7c38196c40f1ae0ed66823aefda7f6ac41c77 SHA-256: 5f75e78b02b8e57d73360a98a67817d735fb15b22f0acdf85b30d3ae2edbbe95
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=ca+intermediate+books+pdf. Another heuristic indicates a link farm with 30 generated SEO PDF links, suggesting an attempt to obscure the true malicious destination. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/pify?keyword=ca+intermediate+books+pdf
    • http://zosetusa.apragp.org/uploads/1/3/0/7/130738836/zematasimigawabov.pdf
    • http://files.elizabethannedanielgisportfolio.com/uploads/1/3/2/6/132695321/e2c2e5eed5a4.pdf
    • http://vamel.talae.org/uploads/1/3/0/7/130739379/zigolisuxibopoleli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9313/9364/files/goxinedutomowukilolaloju.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/fowumotujodulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/create_a_mate.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/estudio_biblico_sobre_la_familia.pdf
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/70897824195.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/75040426285.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/fnv_load_order.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9942/files/fomuxaged.pdf
    • https://cdn.shopify.com/s/files/1/0429/2578/5255/files/wiludofavowozixuzulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/anemia_en_nios_en_el_peru.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/16965836173.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/xiguzapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/99862028033.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/fobav.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_off00007196.bin
76f639e7da4832d89847f98d83dc805cf91e059fbea94e01cb6e53db586a238c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7196 5264 bytes
font_01_sfnt_off0000835c.bin
69dafd6e619bcabb5702368f15e15a4a816e10336a3c0b1e81f4192c164e51c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835C 10316 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.