Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9dc242bd891a5e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-22 12:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5ff52577a272a2227595477de8c045a SHA-1: 08376a76a542156eee440e237003ea148759e775 SHA-256: 1b9dc242bd891a5eb49eb0bda9e4a0e632d0b07446a3430acfc56ff347a1b0f4
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, appears to contain text related to sheet music, likely serving as a lure. The PDF also hosts a large number of links to other PDFs on Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector.

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.com/pify?keyword=hallelujah+piano+accompaniment+sheet+music
    • http://files.emilykirchermorris.com/uploads/1/3/1/4/131407530/defemu-wokasofake.pdf
    • http://fexuxuxe.heatherleephoto.com/uploads/1/3/1/4/131453501/galejibejokesis.pdf
    • http://bevapuna.ameliasclosetfilm.com/uploads/1/3/1/0/131070420/6947694.pdf
    • http://files.omanroadshow.com/uploads/1/3/0/7/130776841/kasulojemuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0147/1388/files/novoxewagawalopizijurur.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8802/files/zilajukuwumitadomuwune.pdf
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/past_tense_worksheet_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/wibuzal.pdf
    • https://cdn.shopify.com/s/files/1/0440/5359/4277/files/minofoxapukirozoragu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/15267551979.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/3691024014.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/suzajid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/dadipuminut.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/23189439224.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/babel_full_hd_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/0916/9815/files/sign_in_sheet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/naxozinefunufotu.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_off00005842.bin
ae3d59e064b65b4e1ff12b5453032c259273ca1969753a659c8f2f357955e52f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5842 5116 bytes
font_01_sfnt_off0000697b.bin
c3c79a380de0418f05bae206157dd8a4ae6289853aea6b6cbf32aafbbb0d5256
pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 14924 bytes