Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3303e252a530ee3…

MALICIOUS

PDF

50.6 KB Created: 2020-08-04 11:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5421236966920d50ca457a74cf6610f9 SHA-1: 3f5a8305574854fa24f4ea6161af47967ddd95ee SHA-256: b3303e252a530ee34a5ee4fda1b54a81f22a6c265252f7e1ed7674be4631a81e
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains text related to 'Bukhari sharif bangla pdf all parts' and includes the malicious URL. Additionally, a large number of external PDF links were found, suggesting a link farm or SEO poisoning attempt. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=bukhari+sharif+bangla+pdf+all+parts
    • http://files.glynhaynie.net/uploads/1/3/1/3/131380875/gagawagagoka.pdf
    • http://files.finneganswakeupwithcandle.com/uploads/1/3/1/8/131871467/newojelovu.pdf
    • http://files.amyshomedaycare.com/uploads/1/3/0/9/130969683/lebajexazaxajedowu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4923/7145/files/46831609099.pdf
    • https://cdn.shopify.com/s/files/1/0439/2904/3099/files/66451863478.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/59192081807.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/23839610394.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6062/files/dumojuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/64003849787.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/napiriredik.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/auto_body_repair_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/99165181636.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/zazige.pdf
    • https://cdn.shopify.com/s/files/1/0434/6658/8325/files/17153594875.pdf
    • https://cdn.shopify.com/s/files/1/0431/2557/1733/files/dolakusorufonatar.pdf
    • https://cdn.shopify.com/s/files/1/0435/1629/7368/files/68544529174.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005673.bin
be1b1f2f235391d10b4e76e477049ea904f1be645015712936b2c84f9e70ab0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5673 5212 bytes
font_01_sfnt_off0000680a.bin
f5912ac19449d20214fb91b2ca814fb7602a49a7352c63de165784d2ffaee10e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680A 8348 bytes
font_02_sfnt_off000081d8.bin
39e01f98a6894c674681490cc85cfa75f81cc1cfef47f063984541781f0e6287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D8 13984 bytes
font_03_sfnt_off0000ad2e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2E 4324 bytes

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