Malicious PDF — malware analysis report

Static analysis result for SHA-256 babf96b53ea1ba74…

MALICIOUS

PDF

41.9 KB Created: 2020-08-24 22:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 111e107c734937d746169ea7c8ce73c3 SHA-1: 920d67cc7694f448de7a6582a7d2f718af9cdae3 SHA-256: babf96b53ea1ba747ed39e5a9dd226e1028602950eb86be8e64b1559a519d4c6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a specific redirector URL, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains the text 'Credit approval form template' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=credit+approval+form+template
    • http://files.nps-music.com/uploads/1/3/1/3/131380754/xatanolovevoroveg.pdf
    • http://ziwitipe.huguenot-church.org/uploads/1/3/1/6/131607163/bupokobomuf_sugunagogir_nevupumopusiji_jopixutajolup.pdf
    • http://wibazo.hutaka.com/uploads/1/3/1/3/131381428/1662892.pdf
    • http://fowiwoxer.comeseescotland.com/uploads/1/3/1/4/131437069/18a66c.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6849/files/36845011330.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/95543096575.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/evaluation_of_buccal_drug_delivery_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/zafinagatamajiwemaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/74760052632.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4204/files/3936208341.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/watch_one_piece_online_english_subbed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/ffxiv_shirogane_map.pdf
    • https://cdn.shopify.com/s/files/1/0439/8612/4958/files/anthony_giddens_sociology_upsc.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/welufemumi.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_off0000670f.bin
2d4264da506f7d6f7ec5c7afe8170318c91c3d0ce541f9627af8bf60cecc9765
pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 4972 bytes
font_01_sfnt_off000077e6.bin
787582dc4eafbf376d18e87ca6f662dd8e366ca55de3ce38e4583cd1a8c73c92
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E6 10164 bytes