Malicious PDF — malware analysis report

Static analysis result for SHA-256 682dda1143224b66…

MALICIOUS

PDF

40.9 KB Created: 2020-08-18 20:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 420c4cb8f18316259d5240220040e949 SHA-1: 65c16e5b0e93267b68231c404044e264388886d5 SHA-256: 682dda1143224b66a403610973cbd52e79fc00d5aa36eeb055d9051bcc285fa4
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a known malicious redirector, ttraff.com, disguised as a free download. The document body, though partially garbled, includes keywords like 'free al quran microsoft word 2010' to entice clicks. The ML classifier strongly flagged this PDF as malicious, and heuristics confirm it links to known malicious infrastructure and acts as a link farm.

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=free++al+quran+microsoft+word+2010
    • http://files.mrfromm.com/uploads/1/3/0/9/130969656/5243266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/12197651006.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/a_level_computer_science_9608_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1188956193.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/here_i_am_on_the_road_again.pdf
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/zibujisozukavetokukede.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/wivunopisisobunenenabasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3499/9975/files/sulepujopogira.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2712/files/advertising_printing_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/baixar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/84700401698.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/computer_programming_languages_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/tikuviduwipitaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a6.bin
e0c32bf1ea4a20e925f4098a34d6a195595376708177a9cb43bfc8a30dfb1a25
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A6 5664 bytes
font_01_sfnt_off000073e8.bin
cd53d54d38c0dbe28212ede7ad144d85b8ceb2c37cfc7ef001ca237f41f9b203
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E8 10256 bytes