Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadce37235f9ccf6…

MALICIOUS

PDF

77.0 KB Created: 2020-07-22 13:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185705ef31ebade42fd1a3bbca0de184 SHA-1: b3dd0bed4ca34df5deae96a134c479d341c1879e SHA-256: eadce37235f9ccf6efd67879c33f720b28c5cbcef9e1d1de549b73008f0f001b
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, appears to reference certification documents, suggesting a social engineering lure. The presence of numerous external links, many hosted on cdn.shopify.com, indicates a link farm strategy to improve search engine visibility for malicious content. 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/pify?keyword=certification+iso+9001+version+2000.+pdf
    • http://files.repa-program.org/uploads/1/3/2/7/132712011/depux.pdf
    • http://files.marketmovesmatt.com/uploads/1/3/0/8/130874629/nuvigure-bufagejiv.pdf
    • http://files.burgfootball.com/uploads/1/3/0/9/130969535/jevut.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/5200804290.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/vepifexajewibodimipoxizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/jovapat.pdf
    • https://jedunev.files.wordpress.com/2020/07/rugewokukofowuxi.pdf
    • https://mewalijovil.files.wordpress.com/2020/07/84145710240.pdf
    • https://javekoxet.files.wordpress.com/2020/06/tamilufigemetuli.pdf
    • https://wuwadapup.files.wordpress.com/2020/06/fasazujixozotafufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/nogusowafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/47566073443.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/jepudepopizojekunif.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/79315341335.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/mogufaxusokikafibe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/pifupunolo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/5432256059.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73792904944.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24370467333.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_off0000e890.bin
c1e2b78692ffecfcf8f5e38c5aed56005dbb02fe9577471c52d73630670247ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 5500 bytes
font_01_sfnt_off0000fb59.bin
601cf05ca870779cc8cdff2ddcc4b454cfb7c2416d269c5fc3b0b356662ced69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 13364 bytes

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