Malicious PDF — malware analysis report

Static analysis result for SHA-256 a681ce4b27a0da55…

MALICIOUS

PDF

47.6 KB Created: 2020-07-28 14:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78bdc6f4ed5b17f9386d3758f3f9a0a3 SHA-1: a2f9334cf32c02252114a0512c8fb2174b055fa3 SHA-256: a681ce4b27a0da55cf679e8ac0c6c3bd73c7121581cc033fdd70f264749bf197
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, with one pointing to cdn.shopify.com. The document body is heavily obfuscated and does not provide clear textual lures. The primary attack vector appears to be directing users to malicious or suspicious external resources.

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=boom+shankar+trance+music
    • http://files.mybestmake.co.uk/uploads/1/3/1/4/131453484/winarifotom.pdf
    • http://files.tear-a-page.com/uploads/1/3/0/7/130738714/simeminom_rujozugexezaw.pdf
    • http://files.lady-arlete.com/uploads/1/3/1/3/131380008/8231599.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/bolamuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/99554040700.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0815/files/90560046029.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/xasunupuromubodibezividem.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/nakarobawobod.pdf
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/nizabetupiluguvilarulapi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/falenibepiwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/12592758769.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/6188295632.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/bufamosusizuzataje.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/16769503060.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://cdn.shopify.com/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007130.bin
f016ed3bff66e22e5feed4eff691076ce1a01e30b6f8921d0e5d82f891428178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 5004 bytes
font_01_sfnt_off0000820a.bin
dcdd6531533e1bc1bbf650eb3f54050a29fcda668c0e5060a2c4b6b8270b9782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 10312 bytes
font_02_sfnt_off0000a573.bin
84369ef1d00369f0626a5db7745853cd1119ee73024487211cd9aa4e1191701c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA573 2928 bytes

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