Malicious PDF — malware analysis report

Static analysis result for SHA-256 0601dce5e4beb8a0…

MALICIOUS

PDF

57.1 KB Created: 2020-08-18 19:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad4fc979a942f7dc6bc625ba0d8452b9 SHA-1: c7d33e427d145e20fedd1a0d810e66098e341024 SHA-256: 0601dce5e4beb8a048e6a7df4e5e0cac6ab2c93f5256ccf790f0cb0802477781
174 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'caremark specialty prior authorization form', suggesting a phishing or scam attempt. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing malicious content.

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.com/pify?keyword=caremark+specialty+prior+authorization+form
    • http://jubixobe.gillianlakethompson.com/uploads/1/3/1/6/131637814/5020682.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/31915510624.pdf
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/bavigupi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2488/2583/files/toxicity_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/kiwetovamowuzixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/australian_formal_dress_websites.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/jatuzegaxonodiwoniti.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/classical_chinese_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/87428816890.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/IMAGEFAP._COMHTTPS_WWW._GOOGLE._COM.pdf
    • https://cdn.shopify.com/s/files/1/0433/1608/4891/files/jigenu.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_off000091f3.bin
ecde7096a8ca5df82a35ac05401d31fba5f76fca3c2e11c0b9dcdfbfa6c76182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F3 5376 bytes
font_01_sfnt_off0000a428.bin
24dd8e5e7c90711f6676caea8d6158b4da8c98372f57c1e2ec823e2fc8d4755f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA428 10864 bytes
font_02_sfnt_off0000c945.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC945 4324 bytes

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