Malicious PDF — malware analysis report

Static analysis result for SHA-256 815fd22d722aad53…

MALICIOUS

PDF

42.5 KB Created: 2020-08-02 16:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b934da26c04caa74ed3b9058d325264 SHA-1: f973d20781b373198b8c8d27defdf161e6d09866 SHA-256: 815fd22d722aad53771abc199ae9f3630bafbccb7a60b61c5434388ecf3094dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, includes the same malicious URL and references Google Sheets, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links further indicates a link farm, likely for SEO manipulation or to host further malicious 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=google+sheets+drop+down+multiple+selection
    • http://files.escaperoom.solutions/uploads/1/3/1/8/131858540/xipewatawekep.pdf
    • http://files.plymouthcantoncivitans.com/uploads/1/3/1/4/131408899/revugebezevomatiluf.pdf
    • http://files.gottatinkle.com/uploads/1/3/1/3/131382274/abc124bbd7a47b5.pdf
    • http://files.csaheating.com/uploads/1/3/0/7/130775027/dedikajokan_safukotigila_limoruvanu_gedusugegobuwib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/datisoragibubumovosozeka.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/tunukosekus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/tusabunag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wekisod.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0466/files/42796664490.pdf
    • http://files.cdlynn.people.ua.edu/uploads/1/3/1/3/131382243/8241403.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/44203705782.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/sajogonegevosawabif.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/7865923405.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/71561021752.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/42183819703.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/55637854293.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/65460706399.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_off0000683f.bin
37b64fca62158f20ac0a2a0a0ed7e736f8b5daea20b61a631cb525f4a63c20f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 5400 bytes
font_01_sfnt_off00007a8d.bin
48db02ae93a5e3117c8801f4b32b74f2acb6a3ed9279ed2c0fb441f48d42e29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 9912 bytes

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