Malicious PDF — malware analysis report

Static analysis result for SHA-256 6589ff324f214fa2…

MALICIOUS

PDF

119.2 KB Created: 2020-08-15 04:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 238e8ceb51aa097bd5f550bd3de9f7f0 SHA-1: b8237d4a0e0e2cf647cfecaf2f558a9778dcb787 SHA-256: 6589ff324f214fa2d0028fa2c6643e78cc0989ce62ffe47c412d1e4f797594e6
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that attempt to trick the user into believing they are downloading free game software. The primary malicious link directs to a redirector service, likely to obscure the final malicious destination. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host a large number of external links, many of which are SEO-themed.

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=rpg+maker+2000+games+free
    • http://tadopok.elemenoenglish.com/uploads/1/3/1/6/131607013/mitutaravijokap-muvob-juriniman.pdf
    • http://depowol.christchurchdayschoolmtp.org/uploads/1/3/1/0/131070420/fikisupimejiber.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/important_quantitative_aptitude_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/makavoxelasolavuwukeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/firuvan.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/jupomigoror.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/99901176693.pdf
    • https://cdn.shopify.com/s/files/1/0434/5643/0230/files/timogibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/41066996256.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/kikimonupumatodosup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/zesevenipiwegasabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/44111779487.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/jolafefaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017d01.bin
77cadab6bdaa6ff74db3b062ea2ab47717d33ec1ad90a088ea016a8f1e57f155
pdf-font-stream PDF embedded font (sfnt) at offset 0x17D01 4376 bytes
font_01_sfnt_off00018c6c.bin
37a23d519bdc86c79d8ee2fd1db87adb526e77df3c78f2b459be9a8843500365
pdf-font-stream PDF embedded font (sfnt) at offset 0x18C6C 5536 bytes
font_02_sfnt_off00019f33.bin
07af6a4c9183f4534981ce23511302c06d50cf910db04327a2c9e0c4525ebe3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x19F33 15368 bytes