Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f32f727ab90d68f…

MALICIOUS

PDF

59.5 KB Created: 2020-08-04 11:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8f029fad0e699f5c10029d00e31710e SHA-1: 2da11d8b7694ee8b75f2657aeb96496d537b3439 SHA-256: 5f32f727ab90d68f91cb6589ebead8a1470affac8f3c68cf9127bbbd17fe7313
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=cfa+level+1+pdf+ebook+download'. This indicates an attempt to lead the user to a malicious site. Additionally, the document body, though heavily obfuscated, contains references to 'cfa level 1 pdf ebook download' and the malicious URL, suggesting a lure for potentially fraudulent content or phishing. The presence of numerous external PDF links further supports a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=cfa+level+1+pdf+ebook+download
    • http://files.artconist.com/uploads/1/3/1/4/131437307/f210bfd2dcc1.pdf
    • http://files.egamposol.org/uploads/1/3/0/7/130775856/a1040f6be24b364.pdf
    • http://files.teamempoweringtogether.com/uploads/1/3/2/3/132303229/3712170.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/jodedenopama.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/98350957891.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/6801429017.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/59771881901.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/ssh_into_virtualbox_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/16657230177.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/febit.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/zezakisafufukufufaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/31504486739.pdf
    • https://cdn.shopify.com/s/files/1/0428/5284/3676/files/dean_martin_roast_cast.pdf
    • https://cdn.shopify.com/s/files/1/0431/4234/8949/files/4783824712.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008aa5.bin
00dceb525ca6037ada16235530af9f336034bba33ce5173ad7f5320772ab1a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA5 4852 bytes
font_01_sfnt_off00009b53.bin
717db7f580636f795c27d107e53dd885f4c236ca0f44f763f5377b5d325512f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B53 19436 bytes
font_02_sfnt_off0000d292.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD292 4324 bytes

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