Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f2712c7e124179…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 14:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f17e1a8533d7ea05a8de83572d1add7f SHA-1: 6a89722f96095141f5b10277859efed8ccf591e7 SHA-256: 38f2712c7e124179b9451b0b8e53fc6a6c262dbf6b06a165453ff7b003ec6c4d
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to 'ttraff.me', indicating a likely phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. The document body text, though partially corrupted, contains the URL 'https://ttraff.me/pify?keyword=bagaimana+nak+buat+google+form', suggesting a lure related to creating Google Forms.

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.me/pify?keyword=bagaimana+nak+buat+google+form
    • https://static.usrfiles.com/ugd/83d902_37894e7a5c384fca8943914662114b00.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d4524433bcc421e9814eef27954b225.pdf
    • https://static.usrfiles.com/ugd/51c472_34f2f3bb7ef44bc5ae1b0aef0c81401b.pdf
    • https://static.usrfiles.com/ugd/b8c837_267a911020be498d91284c98be9abc1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac56e41ec68e4ae8973c6b0885f2cf58.pdf
    • https://static.usrfiles.com/ugd/02beb7_471ade4b810f4f58b2b13bb46064acc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_60f23806f3894e2da67011725b957840.pdf
    • https://static.usrfiles.com/ugd/0511f5_f9ef8443fe41426d9a9a669153bb3230.pdf
    • https://static.usrfiles.com/ugd/7c3584_2f57d603b49241f396870546cf582839.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_251a493db37645aea5f35afe8222872a.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/zololufofafoginipegifaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/27898060620.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/20290624958.pdf
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/ezgo_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0431/6066/6274/files/30774183071.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_off00006511.bin
130d0a46b1330991158207bfe73424422051e950905ef557265925fadcc4aeeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6511 5164 bytes
font_01_sfnt_off0000769b.bin
e8e1bdbe48cd13417a963397d59a3d1cad6ec3c1584019d5f674bbc378fbab06
pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 10672 bytes