Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabbea18a3ba3e14…

MALICIOUS

PDF

46.8 KB Created: 2020-08-08 15:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 608481a234124aef233bde98ff5f75f6 SHA-1: 753280b010302b127b9514ceaa97289a1fdc719d SHA-256: cabbea18a3ba3e14bf84238a31d1001ded56f7336c4d44d16b3576ab801e1341
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 heavily obfuscated, contains text related to 'improve your vocabulary pdf' and the malicious URL. This suggests a phishing or scam attempt where the user is tricked into clicking the link under the guise of educational content, leading them to malicious infrastructure.

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=improve+your+vocabulary+pdf
    • http://files.bonziblend.com/uploads/1/3/2/8/132816066/fajowinogov.pdf
    • http://tubirur.stedsbigredrace.com/uploads/1/3/2/6/132680813/5bba77cf96e17c5.pdf
    • http://favapu.theblingangelcollection.shop/uploads/1/3/1/1/131163635/robatiz-rexama-panewenilavireg-kujatiwukex.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/89855341607.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/muborumuvax.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7477/files/bilekofef.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/98984778338.pdf
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/mebapivategiwid.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/93772275005.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/boss_rc3_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/sevibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7461/7511/files/pijisirivezazawidosani.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/62834655000.pdf
    • https://cdn.shopify.com/s/files/1/0447/9143/1325/files/the_concise_dictionary_of_christian_theology.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/vitilufejirupomoseduge.pdf
    • https://cdn.shopify.com/s/files/1/0433/9951/2231/files/45916290988.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/s/files/1/0433/2729/1544/files/boss_rc3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000796a.bin
8c3e90cb65436fa5cdc4e1d092536949e03de598982b878b84cd58ca59474d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 5360 bytes
font_01_sfnt_off00008b98.bin
a667a9d31d03d883bc07e813599180b45a942e9741b7bcfd0d6e62779e1fa17d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B98 10120 bytes

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