Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e1cf8f2ba46871…

MALICIOUS

PDF

33.6 KB Created: 2020-08-23 00:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78f7fec08da56c85498ce6aa00d8148d SHA-1: 0d63bd8aa40eac3d209ffd0a9a1aec1b0baef604 SHA-256: 11e1cf8f2ba468717d94d97efd72fb1e3db059a4ff502f1683b1896156c5ff1c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, 'https://ttraff.cc/pify?keyword=descendants+2+full+movie+free++mp4', is identified as a malicious redirector. This suggests the document is designed to trick users into clicking malicious links under the guise of providing movie downloads, likely leading to further compromise. The ML classifier strongly supports the malicious verdict.

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=descendants+2+full+movie+free++mp4
    • http://files.wakelandchoir.org/uploads/1/3/2/8/132814342/4ce02bacd7952.pdf
    • http://files.kelseyeliason.com/uploads/1/3/0/7/130775846/1035434.pdf
    • http://files.nbpeipublichealth.ca/uploads/1/3/1/0/131070633/3f7642a93d5.pdf
    • http://files.bettycarlsonartist.com/uploads/1/3/1/4/131453015/2848707.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/baxomopuwigodasegenuzez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/cow_heart_dissection_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/best_cv_format_template.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/banting_food_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/javascript_array_push.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/hornady_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/82171734443.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/45927913596.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/gakoradoxegenugidel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/wadum.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_off00004463.bin
7d50d69ecc40ff1823579bc1c607e491b42e3502906bc34ed1dbeab6052d3642
pdf-font-stream PDF embedded font (sfnt) at offset 0x4463 5580 bytes
font_01_sfnt_off00005754.bin
ad8765bd59608aba19fa2478afbb875c319aa2b6a250d542ef746873e20898e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5754 10012 bytes