Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6e6c36690cbdc1…

MALICIOUS

PDF

44.9 KB Created: 2020-08-12 14:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 126f14b2ac8c809c19d9c430dd69766f SHA-1: fe2ebacac9b2de90b745450b41e225382906e7f1 SHA-256: be6e6c36690cbdc126305ac11dafab61fc0f8602caa89a795c65871f044cf388
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL https://ttraff.cc/pify?keyword=le+scepticisme+philosophie+pdf, suggesting a lure to external content. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a link farm designed to distribute traffic.

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=le+scepticisme+philosophie+pdf
    • http://files.gsskids.org/uploads/1/3/0/8/130873973/korunavo.pdf
    • http://files.bengilbert10.com/uploads/1/3/0/7/130776640/081cc763da284.pdf
    • http://files.perfectlyimperfectlab.com/uploads/1/3/1/3/131381693/wanofotewiduk-vinel-nekedelu-xokel.pdf
    • http://files.eastseidedesign.com/uploads/1/3/1/0/131069863/7814138.pdf
    • http://gotix.mogosoapemporium.com/uploads/1/3/1/6/131607062/10845114cdebca.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/fupukagigoxeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/61500326318.pdf
    • https://cdn.shopify.com/s/files/1/0439/0915/2936/files/23887034074.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/52060123906.pdf
    • https://cdn.shopify.com/s/files/1/0437/3482/7162/files/12699001909.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/sigaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/49328861935.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/51937294860.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/43644692091.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/566051972.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/ephesians_bible_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/14175409381.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_off00006d79.bin
2eac093e2615a9a33317a77445d79980fce885187ef3da3d83c7b04f4f8dfef7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D79 5032 bytes
font_01_sfnt_off00007e80.bin
a986b392b7fe1c71752dc661f1db7f2b0da55384fa50f7679cf857a7d0d81b93
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E80 12488 bytes