Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb28e9d3bb30a99…

MALICIOUS

PDF

58.1 KB Created: 2020-07-26 09:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9227c0c5016d25aff59ba2ac1096d59d SHA-1: e1c0c8fabb4b14ba4baab3c75aa06d6201208d5e SHA-256: 1fb28e9d3bb30a9942857cbefbeba5ef57eca7690e7ffda8112b77690480b0a5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to a URL that appears to be a lure for downloading software. The document body, though heavily obfuscated, contains text fragments related to 'Pdf-xchange viewer pro' and 'keygen', reinforcing the social engineering pretext. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm used for SEO poisoning or distributing malicious content.

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.cc/wb?keyword=pdf-xchange%20viewer%20pro%202.5.198%20full%20download%20+%20keygen
    • http://files.gunsgreenhouse.org/uploads/1/3/1/4/131406435/xazezel-feraparoxebepu-korowime-jeludafujuwude.pdf
    • http://files.merredincrc.com/uploads/1/3/0/8/130814232/3020e6c0482d935.pdf
    • http://files.marandihostetter.com/uploads/1/3/2/8/132814272/42f1bf.pdf
    • http://files.turbochef-bay-area.com/uploads/1/3/1/4/131406885/8702937.pdf
    • http://files.marandihostetter.com/uploads/1
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/kixikalidanigipinaletigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapitawaluzosamorexub.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/12864537773.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/fipanigetorufuba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosadibevejigavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/jumesadinuxobijujinazo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0968/files/xugakorurenaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/48852988042.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/tojulasabovigudezavokaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/30185374414.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/vijigogalasisibezunikug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0802/3966/files/97124552720.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/matitagikivozesapugeraxig.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097ac.bin
a31d760be8bb2fd52427f1d0b88cdd73281ab7d2e539820912e63337bcf5c753
pdf-font-stream PDF embedded font (sfnt) at offset 0x97AC 6148 bytes
font_01_sfnt_off0000acb2.bin
0b20509c8514d138d15d44782a6badb90e6235da7a36326dd08ee7b73b8bcb6f
pdf-font-stream PDF embedded font (sfnt) at offset 0xACB2 14748 bytes