Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8dd7a4e6f154ede…

MALICIOUS

PDF

44.0 KB Created: 2020-08-29 17:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11eeae5a80520bb894db75dc85ded4d7 SHA-1: f422b4a2758fdba342650a49d49ee14091d18e6b SHA-256: e8dd7a4e6f154edec000593c07685138784f8f89b2ba9841481d05d4b8ea581a
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'Harry potter theme song sheet music'. This link, https://ttraff.cc/wix?keyword=harry+potter+theme+song+sheet+music, is the primary indicator of malicious intent. The document also hosts a large number of other PDF links, many pointing to Shopify, likely as part of a link farm to improve SEO for 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/wix?keyword=harry+potter+theme+song+sheet+music
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/andres_segovia_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5836/files/42978798521.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/kiesza_hideaway_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2650/files/fubopimizesile.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/all_arpeggios_for_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63032467643.pdf
    • https://cdn.shopify.com/s/files/1/0435/5558/6203/files/43835707431.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/19343574669.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/lowewip.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfa958c937ce4565a5b468cbf3d886e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_22a277fea62c494f8fa2f190366ff8c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3412b6fb3b5451aa6a36a134e74a7df.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce75dd2301734b02896539888198b395.pdf
    • https://static.usrfiles.com/ugd/b8c837_0572f54cbd5f4cc690874edfab45235e.pdf
    • https://cdn.shopify.com/s/files/1/0450/2716/4310/files/66965548418.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5574/files/skip_counting_worksheets_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/wijow.pdf
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/72157450275.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/zolewibawixod.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_off00006cad.bin
d90fa7edb8dde9baf577bdf2555093e42a6609082ccba5e50b6a42d549bedde5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAD 5376 bytes
font_01_sfnt_off00007edc.bin
1f28c40986657486d0f527272af50a4473f2b69750380d8705cddd395b91c4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDC 10616 bytes

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