Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4b2fc8b43c1184…

MALICIOUS

PDF

123.6 KB Created: 2020-08-10 02:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d471a6143659e826f511d54ef8265e SHA-1: ccb40010d8c98fd12909b3d1d7e2b93ac7a90c91 SHA-256: 8f4b2fc8b43c118473d1d956b3420dace2a0e035cdd102059ea466017a89c52d
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.com/pify?keyword=cour+atomistique+smpc+s1+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The primary intent appears to be redirecting users to potentially malicious content or phishing sites.

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=cour+atomistique+smpc+s1+pdf
    • http://zojanojen.oliviasroses.com/uploads/1/3/0/7/130776487/1570029.pdf
    • http://files.thebiasadjuster.com/uploads/1/3/2/6/132696210/wizowitujavawa.pdf
    • http://files.510marq.com/uploads/1/3/1/4/131482864/gikositolenokowezu.pdf
    • http://files.continuumsofservice.org/uploads/1/3/0/7/130775115/9708160.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/vujizuramajiruwonupif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/wubelawijosonisula.pdf
    • https://cdn.shopify.com/s/files/1/0437/9328/5277/files/8095725219.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/27938361761.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/mariage_d_amour_piano_sheet_easy.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/62816320802.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/pegegokesakejogel.pdf
    • https://cdn.shopify.com/s/files/1/0437/0438/5690/files/sarikozelamodakolikijuxed.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/28489560593.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017427.bin
f99962afbf654ee0d8543e6ae25566a405b8e339abdc0bc3b94a3cf3031982e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17427 5248 bytes
font_01_sfnt_off0001860e.bin
277af4023b750ba7935d7fcc22ef1072b1515d7609c36529f4ca47f0f4b944b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1860E 16724 bytes
font_02_sfnt_off0001b980.bin
5c52d138e81aa8d7c4ca257fd5232e46fb85d3c19ce4044136c42a78017a68a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B980 16728 bytes
font_03_sfnt_off0001d0fa.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0FA 4324 bytes

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