Malicious PDF — malware analysis report

Static analysis result for SHA-256 8933f80c56128c25…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 10:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 238d7bfbc5306de38933d4ae92475c5f SHA-1: a50902a4bc4f71834b2ec4343b93d081539bca57 SHA-256: 8933f80c56128c250f2c237143408594c72d50ac77dd7f479fd45d70a4162c8a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=chromecast++pc+free+windows+10'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading potentially malicious software. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm designed for SEO manipulation, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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.cc/pify?keyword=chromecast++pc+free+windows+10
    • http://files.tickettoridegreatloop.com/uploads/1/3/0/8/130813860/e4101b0b03d3de.pdf
    • http://files.grundmeyerleadersearch.com/uploads/1/3/1/6/131636990/sifixoj_jutixepipi_bevasagipaxuja_sivosukisozi.pdf
    • http://nejeki.vitodorazio.com/uploads/1/3/0/7/130775169/be621d7ada.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/tawusurenewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/57235011803.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/google_chrome_for_linux_centos_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/8487/3879/files/91342965846.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/14425641391.pdf
    • https://cdn.shopify.com/s/files/1/0440/1525/5710/files/benim_hocam_tarih_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/46844067531.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/yamata_sewing_machine.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/kapigago.pdf
    • https://cdn.shopify.com/s/files/1/0449/1840/7335/files/algebra_2_textbook_california.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/21561415095.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_off00006093.bin
f687ba311c02d3493859b8aab5dc810eafc3f677a34f86f61e70562ae309f7c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6093 5552 bytes
font_01_sfnt_off00007361.bin
31716f5a3af280d40f8cde82960c2a8e468ecbc52787fbec580b200a1a2a7f4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7361 10328 bytes