Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d924e3dafccb3e…

MALICIOUS

PDF

41.0 KB Created: 2020-09-09 13:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 986e4df077967c7b9fe5aff86d5c8541 SHA-1: 68b3ccc1fc425eba52d181f248c4f9c6152a7759 SHA-256: 73d924e3dafccb3e49dff5c4d6f6da6182d1d50327e8494dd77fe81664d95560
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body and embedded links suggest a lure related to 'Catholic answers apologist line', likely a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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.link/wix?keyword=catholic+answers+apologist+line
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9785/0017/files/gonebanojuzunorijosuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0975/9641/files/mla_works_cited_document.pdf
    • https://cdn.shopify.com/s/files/1/0428/6811/3574/files/pibabokifikagepikeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/71162939903.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/sofepirituxuzivurufozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/14336743671.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/66892336552.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/46272479691.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/noginabetijepipimaxobalu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5227/files/pigifexokasorexus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/vikings_wallpaper_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/0006/0310/files/77337948251.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/58423863221.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/list_of_common_themes_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/prognosis_pneumonia_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0428/5490/8071/files/dododogikumewinefaj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062f1.bin
64fa7eccb903ed1e3de75c3cb448cc2b5c386d7f6f7bd2119617895ca415ab49
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 5192 bytes
font_01_sfnt_off000074a8.bin
67c7849eaa0695f40b8400174a01284f8e17911e14ccc9bb369c4424b49a04b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A8 10076 bytes