Malicious PDF — malware analysis report

Static analysis result for SHA-256 e608c7ae13628dd0…

MALICIOUS

PDF

33.2 KB Created: 2020-08-19 14:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebd535e3228c504e5a364953ad3d987a SHA-1: 5a68b1b96c1f825aabaa46056bdd8bb490381025 SHA-256: e608c7ae13628dd00fbf506847868be2befd09bbc2c8cf6630ae07f3bbf6e15e
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One of these links, https://ttraff.ru/pify?keyword=sheetrock+saw+sheath, points to known malicious redirector infrastructure. The document likely serves as a link farm to distribute malicious content or conduct phishing attacks.

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=sheetrock+saw+sheath
    • http://files.willemhendrikse.com/uploads/1/3/2/6/132682989/lawomovukigoti.pdf
    • http://karurak.radoslawrogoza.com/uploads/1/3/0/8/130874359/duperapi_kolafimumomufa_fikuzotada_bawewun.pdf
    • http://files.fureverisapromise.com/uploads/1/3/2/6/132681579/7478360.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/articles_dfinis_indfinis_partitifs_contracts_exercices_corrigs.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/86209789563.pdf
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/lijixujeguwokorun.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/lesug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5265/3973/files/63744866780.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6791/files/38721111071.pdf
    • https://cdn.shopify.com/s/files/1/0440/2996/8534/files/27532231724.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7193/files/equations_of_straight_lines.pdf
    • https://cdn.shopify.com/s/files/1/0432/4596/1383/files/71729539986.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/15131092939.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/dagulota.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2934/files/35958902229.pdf
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/bujitilavixe.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_off0000456a.bin
c0328018ae69a92cea4488bf39f34012660ebb39f7510710a602f4c1b303d398
pdf-font-stream PDF embedded font (sfnt) at offset 0x456A 5112 bytes
font_01_sfnt_off000056d9.bin
7630dd8e6aa9e4b7e427b5e7bdace49c7cb33a91713007e55fbd9f66b83a2ec5
pdf-font-stream PDF embedded font (sfnt) at offset 0x56D9 9756 bytes