Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85de902c5d3aa9a…

MALICIOUS

PDF

33.7 KB Created: 2020-08-09 11:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46eb522d7fbeecd97684ccbdaa927a82 SHA-1: 4d4e1e6ccb7fed8ef406c92040d7eacf9ae6e314 SHA-256: b85de902c5d3aa9a9086a7b67fd7c6dc1bbe98c1dcd027d0deba9ac711baf80c
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm designed to manipulate search engine results. The primary malicious link redirects to a site that appears to be a lure for downloading content, likely malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the document's purpose is to trick users into visiting this URL for a fake download.

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=aashto+roadside+design+guide+4th+edition+pdf+free+download
    • http://bosuri.lithappens.org/uploads/1/3/1/4/131453177/fupafazokox_robexosale.pdf
    • http://fakute.colton-craig.com/uploads/1/3/1/4/131437515/7885055.pdf
    • http://pexugolig.nature-myview.com/uploads/1/3/1/6/131637016/niteruziludof.pdf
    • http://files.bethbooram.org/uploads/1/3/2/8/132814286/d6fdacc1c201.pdf
    • http://files.happy-cow-bakery.com/uploads/1/3/1/4/131438419/5028588.pdf
    • https://cdn.shopify.com/s/files/1/0437/1133/2507/files/agnes_grey_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6341/files/vipufikexekixasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/date_picker_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/julufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7470/5815/files/83048112209.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/beauty_s_kingdom_anne_rice.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/bonus.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/2830_merrywood_drive_sacramento_ca.pdf
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/a_cry_in_the_night_mary_higgins_clark.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/gitipekagadonex.pdf
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/venture_capital_and_private_equity.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/76800861447.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_off00004705.bin
c6aca2c8e05275d353f6802ad68f75f94a59bafa661e26ba7cc29f44c41c63d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4705 5472 bytes
font_01_sfnt_off000059b7.bin
fe38eb58e9b34f84208fc65817eedc14ed5ffc3df740fb04016ea10099a72834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B7 9376 bytes

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