Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55ec42b1a778467…

MALICIOUS

PDF

43.7 KB Created: 2020-07-08 23:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4315756da49575d6f76243a5a6ee52c SHA-1: 2ab859bb7d5fffe4d6431866b47cab67ad1e7dda SHA-256: a55ec42b1a7784673b494e81751dea7882f62336d6bdb6a7e42477100e1eb096
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to redirector infrastructure. The primary link, 'https://ttraff.cc/wb?keyword=classical%20piano%20sheet%20music%20for%20intermediate%20pdf', is a known malicious redirector. The document body also contains a visual download button lure, reinforcing the malicious intent of directing users to external, potentially harmful, content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=classical%20piano%20sheet%20music%20for%20intermediate%20pdf
    • http://files.scribbledscratch.com/uploads/1/3/1/8/131856071/3861211.pdf
    • http://files.honesthomeinspector.com/uploads/1/3/1/4/131437233/xodifajer.pdf
    • http://files.galacticexpo.com/uploads/1/3/1/4/131453332/sagesotivedenes_xexasipo.pdf
    • http://files.hscisteacher.com/uploads/1/3/0/7/130739895/felijilaborela.pdf
    • http://files.lindalgraham.com/uploads/1/3/1/4/131455283/7d86161771d526.pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.spotlightcoachingdc.com/uploads/1/3/0/7/130740090/newazow.pdf
    • http://files.ashboogey.com/uploads/1/3/0/7/130776266/95775e5a11984ff.pdf
    • http://files.100womensalinasmonterey.com/uploads/1/3/2/7/132740181/bf9c0dad9fc23b5.pdf
    • https://lidobiwugam.files.wordpress.com/2020/07/debatomubumisud.pdf
    • https://safowazebafo.files.wordpress.com/2020/07/54864409117.pdf
    • https://zejuguguma.files.wordpress.com/2020/07/galeponanegupoxelusaxo.pdf
    • https://wadubol.files.wordpress.com/2020/07/dunotutup.pdf
    • https://tegedow.files.wordpress.com/2020/07/zitem.pdf
    • https://kozoribudos.files.wordpress.com/2020/06/zowokew.pdf
    • https://leridopezeso.files.wordpress.com/2020/06/nasakekabikuwamitajab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.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/
    • https://leridopezeso.files.wordpress.com/2020/06/nasakekabikuwamitajab

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb4.bin
c84e3a5588c705f1c81109ea736f1de212c5073c07034354b1a64174b66d89a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB4 5300 bytes
font_01_sfnt_off00007d80.bin
dc27b34b3dd6473d7e84a1d938e3456e797df77c71f17912ef64c6bf2d636c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D80 10436 bytes

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