Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48c21a00d880009…

MALICIOUS

PDF

42.9 KB Created: 2020-08-08 05:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cde9cf26fdb0f82c92149ae76b36fc68 SHA-1: 3caf2f5dd02bcfa57f3a44f3d133b2aec216bf73 SHA-256: a48c21a00d88000908407dab7292aa352438ec05bd8bad6d82af610484c6c2b5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains the URL 'https://ttraff.ru/pify?keyword=administrative+procedures+pdf', which is a known malicious redirector. The presence of numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggests a coordinated effort to distribute malicious content or phish users. No scripts were extracted, limiting the analysis of specific execution behaviors.

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/pify?keyword=administrative+procedures+pdf
    • http://tazinel.spiritearthreiki.com/uploads/1/3/1/4/131406082/pefilefafivepolasex.pdf
    • http://dijes.lizsowersburas.com/uploads/1/3/0/7/130775413/9260285.pdf
    • http://zapewi.anitaglucina.com/uploads/1/3/1/1/131163599/tiwipapef_tedowumunaxixem_kavixewun.pdf
    • http://files.somdjuniorwrestlingleague.org/uploads/1/3/1/4/131408581/wetuxufi_ketogob.pdf
    • https://cdn.shopify.com/s/files/1/0429/3771/2806/files/cellule_animale_et_vgtale.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/psychology_questions_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4718/8640/files/77187483516.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/luzaguxubibepuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/juwijaxoxuxisevurozigu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/64318190845.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/wovinolifosax.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/vidokuduped.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/46555026034.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/dejuzewinumonekubeku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/63879194225.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/pinimonifalobo.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_off00006ac7.bin
6f92ac38281b40037168fe5390ac23a97f10b71ded7f2536c40e8aef2b81dfc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC7 5316 bytes
font_01_sfnt_off00007cca.bin
f8352e2442249c3485a8fe29f9519496353fddb9de0bc2b12099b547561b2cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCA 9876 bytes

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