Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb276925cc99138…

MALICIOUS

PDF

67.4 KB Created: 2020-07-30 10:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f6332bfd6f78df9723054c64df2b8ca SHA-1: 1a1ad2b267b74a6ef01f17699516b1277705e16b SHA-256: 1bb276925cc99138ed67e6ea3f68c5f50c7055fad4a37f479400bda9fd19cfee
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'ap scert text books pdf download'. The presence of a malicious redirector and a link farm indicates an attempt to direct users to harmful content, likely for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly supports this attack pattern.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=ap+scert+text+books+pdf+download
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdf
    • http://files.reviveinteriorsnw.com/uploads/1/3/0/7/130776573/2295007.pdf
    • http://files.mrball.org/uploads/1/3/2/8/132814906/8685016.pdf
    • http://files.wholesalewarehouse.ca/uploads/1/3/1/1/131164440/8807050.pdf
    • http://files.hoxieonline.com/uploads/1/3/1/8/131856133/2144257.pdf
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/veb
    • https://cdn.shopify.com/s/files/1/0434/9424/4516/files/42482519791.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/jizewugetegadikukinewozuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/rifijemuroxabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/kibuvir.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/gogovilemawafamep.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/28794540357.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/12840262371.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/zusafolalujudekijumud.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/93902843979.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/98903966495.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/radivejapemokagotudik.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076e5.bin
fdd44886c7bca53df2dcce8db782b4144b652519d669887d0339fb5c72ace025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E5 5240 bytes
font_01_sfnt_off000088c8.bin
99fa176e76f84c6d8289e5f777ab425da6aedc4f607fdcd38a1cb07a58ea118d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C8 23988 bytes
font_02_sfnt_off0000bcec.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEC 2320 bytes
font_03_sfnt_off0000c73f.bin
3e647d1348510cf8f600be41d457ad4eb07be3084a64c79eb2b3d25692cda09e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC73F 10020 bytes
font_04_sfnt_off0000e9b4.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 16224 bytes

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