Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9858194d0d6b7fa…

MALICIOUS

PDF

43.4 KB Created: 2020-08-18 23:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c9a65d233fd4d8fd8c413f4d58b88a6 SHA-1: 300774afa43a1f46c899c572a473aa81a8df153c SHA-256: f9858194d0d6b7faa021c8ccbd4cb8e7acf893b6d5fdd0f1c000adb367de58f1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, indicates a lure related to a '6th grade math module answer key'. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted, limiting the analysis of direct execution capabilities.

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/pify?keyword=6th+grade+math+module+3+answer+key
    • http://files.richardhstephens.com/uploads/1/3/1/0/131071157/731797bd05.pdf
    • http://files.magnetvideolab.com/uploads/1/3/1/4/131408432/kerafirujesutav.pdf
    • http://files.jvandoorne.com/uploads/1/3/2/7/132740541/kaviwarawo.pdf
    • http://vugatute.graces-ark.com/uploads/1/3/1/8/131856271/naxigagesejobe_xonixokuveleb_tubex_bizerozeroji.pdf
    • https://cdn.shopify.com/s/files/1/0430/7589/5447/files/viginozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/gajekoxurujebasemevix.pdf
    • https://cdn.shopify.com/s/files/1/0439/9602/0894/files/kipexuvifinurip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/beginner_english_reading.pdf
    • https://cdn.shopify.com/s/files/1/0438/8270/9160/files/certified_cicerone_sample_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/presentation_in_english_macmillan.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/dreams_fleetwood_mac_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/chinese_restaurant_menu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/75435714641.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dcb.bin
79915d0bc0300a6b5253a0b12c2312a3948fbb2cba3246952c32fda12393138e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCB 5720 bytes
font_01_sfnt_off0000612b.bin
a5dffc7de49c91083c16bed3ad2853addc15474089c628e983ab781fa623e8c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 12912 bytes
font_02_sfnt_off00008a05.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 16092 bytes

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