Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d61d75ea4db784…

MALICIOUS

PDF

41.6 KB Created: 2020-08-02 15:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1680ff780b8fd1c56eff342bb6613105 SHA-1: f7df6c704dbe7a5ca5c4b1c8b82b318e78f5f5e2 SHA-256: 77d61d75ea4db784b0b02718257d144fff086e0c2d54b8c4eba8e0388ee4ace3
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics for linking to malicious redirector infrastructure and for containing a large number of external PDF links, suggesting a link farm or SEO abuse tactic. The document body contains a lure related to 'Husqvarna sewing machines' and points to the malicious URL https://ttraff.com/pify?keyword=husqvarna+sewing+machines. While no scripts were extracted, the presence of embedded URLs and the critical heuristic firings strongly indicate a malicious intent to redirect users to harmful content.

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=husqvarna+sewing+machines
    • http://rosovisof.joshuaybarbo.com/uploads/1/3/1/8/131871390/pizazaxogobuf_vulagutopevop.pdf
    • http://files.graceandgloryyoga.com/uploads/1/3/1/4/131483148/tonuvefezux_nilotixa_fonivarifixa_kedegijogedif.pdf
    • http://files.amandathompsonphoto.com/uploads/1/3/0/7/130776449/numedikokaxe.pdf
    • http://files.goldenbulletpublishing.com/uploads/1/3/1/0/131069904/9fb05d25353d9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jamitaribigonekadori.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/66069617850.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/zikujixigabasebediliw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/85444535606.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/jukixajamarifugawafetomob.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/begefepekamekubanuto.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/limatuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/gallons_to_l.pdf
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/25405923859.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/zujeguxebapadas.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_off0000641a.bin
b8a5796065c25780c5d52ba152e581213843deb22e2f697fbc77cc525c87b7d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 5420 bytes
font_01_sfnt_off00007676.bin
d026b9d9ab38332bd7c8518e04b7a2c02639cddfea9539b1ef32e65e11d3e7d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 10260 bytes

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