Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a3076b30cfc5b4…

MALICIOUS

PDF

38.5 KB Created: 2020-08-12 15:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6306c104dea953c8459148db2943a8f1 SHA-1: b0427c78926b9b006c02c3242124d7e17fdb4742 SHA-256: 22a3076b30cfc5b4262c95744386c3c27dfd71dc0b0e2c7ffe6a0ebb9d6a4586
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, masquerading as free study Bibles, which is a common lure for phishing or malware distribution. The primary malicious link, https://ttraff.ru/pify?keyword=biblia+de+estudio+macarthur+gratis+pdf, is identified as a redirector to potentially harmful content. The document body itself is heavily obfuscated but contains references to the lure and the embedded URLs.

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.ru/pify?keyword=biblia+de+estudio+macarthur+gratis+pdf
    • http://files.pretoriawestmethodist.org/uploads/1/3/1/3/131383754/bewolekevito.pdf
    • http://files.46north.ca/uploads/1/3/1/8/131856247/0b9436.pdf
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdf
    • https://cdn.shopify.com/s/files/1/0432/0624/6557/files/69368471868.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/48696080000.pdf
    • https://cdn.shopify.com/s/files/1/0430/0157/7625/files/pisufukudojisivigetitaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/gonidofupiluli.pdf
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/febotazafasiso.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/atomic_habits_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41697505155.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/favasubesuxuxasifekexevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/88158104230.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9484/files/pujufomumi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/samalijatitegesilof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/wejosazevojowifudizevim.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/sukibuwifoval.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/tixonivufoja.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005532.bin
399d0b55889a0181536049fab61c87677616c77cc52a8c5e31494038fce0d229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5532 5760 bytes
font_01_sfnt_off0000689b.bin
eac60246ddb0a94e6b628ffca86de2d50d57794f78dbb3f1fd831c1c6b4b088f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689B 10704 bytes

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