Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad17f052ebc4952…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 10:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 693a45dc4b5c60bcd476aa1669b36dd3 SHA-1: 19e4199b4c49edc9709c88a814e9cec150b663d5 SHA-256: aad17f052ebc4952e5661da2a4e680fdfd618b56851857e6d6f6466d12bcb413
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=helsinki+accords+apush'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous other links to Shopify, while labeled benign, suggests a link farm technique to obscure the primary malicious destination.

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/wix?keyword=helsinki+accords+apush
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/android_9_huawei_mate_10_lite.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/39940763355.pdf
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/53745344360.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/45995236490.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/58111104448.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9384/files/luduxawizoxekivuri.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/haldex_slack_adjusters.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/42458943661.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/71565575588.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/nalomemotepejoxifusafu.pdf
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/tufolazejozenobudet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3183641906.pdf
    • https://static.usrfiles.com/ugd/111c46_dab2b12cbd2f41e686bba8079d52b4e8.pdf
    • https://static.usrfiles.com/ugd/738632_4fff8bfd459e49f1bd65f7e30105daed.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://static.usrfiles.com/ugd/738632_4fff8bf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f0.bin
7b1f34a1ecc76a6acff60eb3af6863d922ebb35f320a0dcb3370479e9919cac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F0 5184 bytes
font_01_sfnt_off0000757b.bin
364a0b9c08370ea58c53866f5cec00c27158d3dff047ab011c747586592ce637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757B 10716 bytes

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