Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6aeb6b489f0a0e7…

MALICIOUS

PDF

43.6 KB Created: 2020-08-22 02:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8c4d9c5048835f1fa34324e56146dbf SHA-1: 2a6f285ab95fcc8c0309cde4cb7efb866ce6d457 SHA-256: d6aeb6b489f0a0e7159451f7268af6e8dfe85241ee3998e8a232df49d67f8354
150 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as 'job interview answers tips' which redirects to a malicious URL. This indicates a social engineering lure to trick users into clicking the link. The PDF also contains a large number of embedded links, many pointing to shopify domains, which is characteristic of SEO link farm abuse to obscure malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=job+interview+answers+tips
    • http://files.ninjamagik.com/uploads/1/3/0/8/130874629/jatupisejumelovavog.pdf
    • http://vapigupi.saintgregorysileby.org/uploads/1/3/1/3/131380934/kotebogisarisaf-folijoma-rojugizaj.pdf
    • http://files.foundthingsco.com/uploads/1/3/0/8/130874284/redosapimu-mosad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/30518075770.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/79815428623.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/daffynition_decoder_algebra_with_pizzazz_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/zufasanoxudezajewukovilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/surafozejalap.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/miganaforines.pdf
    • https://cdn.shopify.com/s/files/1/0451/3277/5589/files/witcher_following_the_thread.pdf
    • https://cdn.shopify.com/s/files/1/0437/4147/9066/files/81056681803.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/english_grammar_practice_book_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/7200/2974/files/28670924357.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/principles_of_artillery_weapons.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_off00006126.bin
da0d7884c3429373830f69aedd0361616f6712d10fd0c052a3bc17a72ec412c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 4848 bytes
font_01_sfnt_off000071b1.bin
5054a02df0236523f1cf610ee4de9d75ff743d6c1b595dc1355368eb46913f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B1 9960 bytes
font_02_sfnt_off000093be.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93BE 4324 bytes

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