Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99e6575855c2440…

MALICIOUS

PDF

49.6 KB Created: 2020-08-09 10:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c4751f68f98e12d2f5252d4e14559fc SHA-1: bb25fcafcbd5fa323dcf770f03880a7b26a50b09 SHA-256: f99e6575855c24403b6880cca93c08d30e45787d97f046847fcb24192fca87b1
150 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=askep+atresia+ani+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to PDFs hosted on cdn.shopify.com and other domains. The document body, though partially corrupted, contains the malicious URL, suggesting a lure for users to click and be redirected. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=askep+atresia+ani+pdf
    • http://files.viableoptionsphotography.com/uploads/1/3/1/4/131407802/nepugojino_rojanumeve.pdf
    • http://files.armycadetsofamerica.com/uploads/1/3/1/4/131407281/lijefali_nebegakofewuse_labipukuwof_fulules.pdf
    • http://fibozu.chrisann-jeff.com/uploads/1/3/1/6/131606289/vurofajit.pdf
    • http://pikox.northstartxwp.org/uploads/1/3/1/4/131407005/walox-naxavamo-javagowukepe-jarevamize.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.pdf
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/gipibujisux.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/mimikibutagoganemizuvisel.pdf
    • https://cdn.shopify.com/s/files/1/0433/1556/0616/files/dixeliw.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/ios_6._1._6_jailbreak_no_computer.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/54124130018.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/jagolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/83771363593.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/18527893988.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/14555280034.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/junozafuli.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b98.bin
9a18ac78a3ccadaf70aec51f0e48e4188a54585a53069accc7c3258f39704a5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B98 1976 bytes
font_01_sfnt_off000084b7.bin
5bf5632fd8c915231545061f6537379b01f1a9ef4b4b396d97f157cb032139ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B7 5056 bytes
font_02_sfnt_off000095fd.bin
e25612ceb734bb80153dbcc6bd1f2668b8c381af7a0b47e3c526bad7f1e8c045
pdf-font-stream PDF embedded font (sfnt) at offset 0x95FD 10336 bytes