Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47ac795eb5c1fdd…

MALICIOUS

PDF

43.6 KB Created: 2020-08-10 17:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aaa99de65644961df4e603bdedf5c37 SHA-1: a07a73f8649592b03a0e97b10360326d9798d177 SHA-256: c47ac795eb5c1fdd55dcf48eec9050d7c017228687b6969f45e0c5a0e0d660bd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'small business administration business plan pdf' and the malicious URL. This suggests a phishing or social engineering lure, aiming to redirect the user to a malicious site under the guise of providing a business plan document. The presence of numerous Shopify links, while mostly benign, serves to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=small+business+administration+business+plan+pdf
    • http://files.tauntonpathways.org/uploads/1/3/1/3/131381006/sijuzetera.pdf
    • http://files.littmanncinema.com/uploads/1/3/1/4/131408899/viwawali_fuwudunajadina.pdf
    • http://files.samluangkhot.com/uploads/1/3/0/7/130740442/5631389.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6039/files/63557119493.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/tipos_de_acretismo_placentario.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5546/files/girekiwapezokobinim.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/50210160061.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/41852548363.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/91314334001.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71419102660.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/kappa_alpha_psi_scroller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/nitefawuwozotevawukoki.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/42959451649.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/midolatajugavopiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/nonewugarudotiduxoliwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/guxobewefudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/5000_daily_used_words_in_english_arabic.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_off00006d06.bin
748c95f2f1911af3ca8eaa5c77b57639c8bddc8d090260702c40ca4a07c71420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D06 5428 bytes
font_01_sfnt_off00007f55.bin
f1f2e8a240908d2de4b0e4dd1c0c25e340d14669b6be51cf461cea925ed1d338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F55 9928 bytes

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