Malicious PDF — malware analysis report

Static analysis result for SHA-256 867e42e6f02c6f3a…

MALICIOUS

PDF

52.4 KB Created: 2020-08-06 09:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a48424ad067ee9bd6680716ea582f506 SHA-1: d7408c2ce06c69699054304e724210845cba28a6 SHA-256: 867e42e6f02c6f3a8dd3612f6bd04290e9d714991cff5c17290b17422baad3b3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which points to a known malicious redirector at 'https://ttraff.ru/pify?keyword=difference+between+archaea+and+bacteria+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site disguised as a relevant PDF. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=difference+between+archaea+and+bacteria+pdf
    • http://files.matthewcampbelljewelry.com/uploads/1/3/2/6/132695372/dadesakiki.pdf
    • http://vasibo.asiamitchelltabb.com/uploads/1/3/1/4/131409090/dae1894.pdf
    • http://gimageg.revkristenkuriga.com/uploads/1/3/1/4/131453194/gemerat.pdf
    • http://files.sandsippas.com/uploads/1/3/1/3/131384656/wosezifonalimum.pdf
    • http://vasibo.asiamit
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/60445186259.pdf
    • https://cdn.shopify.com/s/files/1/0435/5447/2087/files/ny_dmv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7746/files/mejegetidibadiwibi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/xilerolezune.pdf
    • https://cdn.shopify.com/s/files/1/0446/4757/9811/files/accident_causation_theories_and_concepts.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/50374984179.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9949/files/44007135699.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/gs_convert_to_png.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/87743122224.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9753/files/moforabubalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/70135767371.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/equal_employment_opportunity_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/jewijunugujagazurubog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082ac.bin
115489e85952a721c4535ced47124ca1974f0e39eca6e4fb03b971e6436c081e
pdf-font-stream PDF embedded font (sfnt) at offset 0x82AC 4944 bytes
font_01_sfnt_off00009378.bin
328279d10dbd0e1e5b2766aeaa8d5d32ad41095e026b69255d656e64ef6aa7aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x9378 10076 bytes
font_02_sfnt_off0000b5ee.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EE 4324 bytes