Malicious PDF — malware analysis report

Static analysis result for SHA-256 936e3144f30d4c53…

MALICIOUS

PDF

50.7 KB Created: 2020-08-17 02:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50414f52712bbf7d43d883f2fa612407 SHA-1: 84d53524ba855f16e4ebd1ccfd2198d05f2f4f43 SHA-256: 936e3144f30d4c532d744d055d67c97178fc419bb917c242459d964ed353e483
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=careplus+authorization+form+pdf'. The document body, though heavily obfuscated, contains this URL and appears to be a lure for a 'careplus authorization form'. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to distribute malicious content.

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=careplus+authorization+form+pdf
    • http://files.ayamcemani.co.uk/uploads/1/3/2/6/132683484/abc5dd.pdf
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/woduduzul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/surgical_asepsis.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/psychological_perspectives.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/milaxemimanakesibujebod.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/243625727.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/luzilopu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/26919651689.pdf
    • https://cdn.shopify.com/s/files/1/0451/1694/8633/files/vcds_12._12_rus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/adafruit_motor_shield_v1.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/21486180988.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/subnautica_charge_batteries.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_off0000780c.bin
8f2afee7aafda630b8ca862e4594249ec8bc22b2636827560030b2418b2c7a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780C 5236 bytes
font_01_sfnt_off000089ba.bin
f52f50990909cdb156e917883dceb412b9fde8f3f9c578cc35a0b5ee1b1c1560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89BA 11524 bytes
font_02_sfnt_off0000b00c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB00C 4324 bytes

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