Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f72a97460ae490a…

MALICIOUS

PDF

44.0 KB Created: 2020-08-06 02:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcdf02eb239f03e6a122920fca669ff8 SHA-1: c1822e12cc27d9740acf91fbcd293243a2ba6bbc SHA-256: 6f72a97460ae490a81e6e9c8f95af01d08a04865988fda146eba997ba7e027c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, https://ttraff.cc/pify?keyword=difference+between+collision+domain+and+broadcast+domain+pdf, is identified as a malicious redirector. The document's structure and the presence of the malicious redirector suggest an attempt to drive traffic to potentially harmful content, likely for SEO spam or phishing purposes.

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=difference+between+collision+domain+and+broadcast+domain+pdf
    • http://files.biohealthworksinstitute.com/uploads/1/3/1/8/131871994/bujirevisunolo_xabaviza_gimov.pdf
    • http://files.ohsband.org/uploads/1/3/1/4/131411688/gigevaluzesebat-xojenuges-sebajajo-vekejunarunuso.pdf
    • http://files.nextlevelgymnastics.net/uploads/1/3/1/0/131070689/766860.pdf
    • http://gajog.limoservicefriscotx.com/uploads/1/3/0/9/130969744/6779451.pdf
    • http://files.erikharmens.com/uploads/1/3/1/4/131407144/5631300.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/whirlpool_dryer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/definisi_cacar_air.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/27609483251.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/zijagapu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9820/0481/files/61159640761.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/losuguwitafomolujufukebol.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/40383350384.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/41235224920.pdf
    • https://cdn.shopify.com/s/files/1/0438/1668/1629/files/playgirl_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/75060352659.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/jakukorabav.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/54527959169.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/rowovotifukaj.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_off00006c5a.bin
c3c47a6218c0a299bc7a46b2ba57b62691bb08d81ff0e6aefda70c9a250208eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5A 5532 bytes
font_01_sfnt_off00007f22.bin
3be94f944699549ee0e47f374790362fcb75c2866bb1c9d2ca279d4669b312a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F22 10316 bytes

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