Malicious PDF — malware analysis report

Static analysis result for SHA-256 835b319c30865396…

MALICIOUS

PDF

49.9 KB Created: 2020-08-07 07:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a63e077e3d46e95b3e39cb30cc8ea407 SHA-1: 61c4f13cca082329af29930352e6b02f26ec5ae3 SHA-256: 835b319c30865396bf36591dfa12c2311282cecc0c9fcebf709739f3447fd874
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to a redirector service, indicating a link farm or phishing lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that at least one URL leads to known malicious infrastructure. The 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam context, although the document body itself is heavily obfuscated and does not provide clear textual lures.

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=medical+laboratory+safety+manual+pdf
    • http://files.ariverofnorway.com/uploads/1/3/0/7/130774968/lixurowozisojigoni.pdf
    • http://files.baglancommunity.org/uploads/1/3/0/8/130814245/liluwuwotenoka.pdf
    • http://tudezop.benedicthillshoa.com/uploads/1/3/0/7/130740249/9751715.pdf
    • http://dafer.balerno-communitycouncil.org.uk/uploads/1/3/2/6/132681513/9531091.pdf
    • http://files.greenfieldresdesign.com/uploads/1/3/1/3/131383959/dce696a35a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/tejuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/sukinawegunaziti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/72334709456.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/labovitegasedasideb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/25153756643.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/8639111981.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/89944801249.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/83224134784.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/zoraz.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_off000077ac.bin
a3b4367053551bf408cc37589246bd2cec00d59c792cf39abcee5a39c0a54151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AC 5432 bytes
font_01_sfnt_off00008a06.bin
f74d5e180be0873e0ff474f6f510ddf1e4f792f96fe94a8bbae0d40e0762bf67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A06 10120 bytes
font_02_sfnt_off0000ac94.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC94 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.