Malicious PDF — malware analysis report

Static analysis result for SHA-256 3206f7133209ca08…

MALICIOUS

PDF

72.3 KB Created: 2020-09-04 19:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ef2a0813f12a023cfdfb4ab5de22f01 SHA-1: 50b0bb3f255f87440cdaaa055b25d0410622f387 SHA-256: 3206f7133209ca08a13bbda8bf4180c4568660baf354d120616fc11662b86c52
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/wix?keyword=soundcloud+hq++online'. This URL is presented in a way that suggests a lure for users searching for 'Soundcloud hq online'. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary intent appears to be redirecting the user to a malicious site.

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/wix?keyword=soundcloud+hq++online
    • https://cdn.shopify.com/s/files/1/0428/9540/9311/files/getus.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/35873791230.pdf
    • https://cdn.shopify.com/s/files/1/0465/8321/8343/files/45973501681.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/36924279359.pdf
    • https://static.usrfiles.com/ugd/07e02c_d2dccd7fff1246d4b4f6223a9bd310cf.pdf
    • https://static.usrfiles.com/ugd/2b25b5_c26f55ccb0ce4f53801119452d12b8b8.pdf
    • https://static.usrfiles.com/ugd/3eb4bd_7834e786b1984fb292276fc59bfa2129.pdf
    • https://static.usrfiles.com/ugd/e2b09b_44efb6882e6241788c1794623a82d30d.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9535/files/23370394009.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/balada_para_adelina_piano_partitura_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/6090/4615/files/amalgamation_of_partnership_firm.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/firadelusajofubetojifodi.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_off0000df5a.bin
d15cf659e898fe5517eb7e9593afd792940d37e0eda32adc9365f9ece3ce4431
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 4772 bytes
font_01_sfnt_off0000ef92.bin
dce91a08334b98e2da26b97a961b41b280a0d354526a140f7f5e396debf24585
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 10864 bytes