Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a63718af1c8d64…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 20:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df6edc8bf927041243597a8b6b60411f SHA-1: d74608a006c6a326d31ea721671986055545c7b0 SHA-256: d8a63718af1c8d6484be7ea3c70d4d6c1b35a4c849765e45fcfb4ae2c9317042
154 Risk Score

Malware Insights

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

The PDF document is identified as malicious by a machine learning classifier and heuristic rules indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a 'residential lease agreement template pdf', which is a common lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.com/pify?keyword=residential+lease+agreement+template+pdf
    • http://kefalo.activitymatterslab.org/uploads/1/3/0/8/130873804/xolovilavogife.pdf
    • http://majewela.youthandloud.org/uploads/1/3/2/7/132712615/5927532.pdf
    • http://gepukam.nookandcrannyorganizing.com/uploads/1/3/2/6/132682646/sevawig.pdf
    • http://files.golfclubmd.com/uploads/1/3/1/3/131384436/sazusiwop_nefadir_kunajoxe.pdf
    • http://files.hearthfirenordicwares.com/uploads/1/3/1/8/131856306/4206358.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3138/files/begawakerixidefonadodob.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/ginaviwasukofaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/48257507469.pdf
    • https://cdn.shopify.com/s/files/1/0431/3150/2749/files/35108895685.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/dolegepeduvitopixufow.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/suwuvosijetoxitudojegek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27621352833.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/african_culture_and_civilization_a_textbook_for_ges_102.pdf
    • https://cdn.shopify.com/s/files/1/0439/4372/3163/files/72637833612.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/jexadaxiripof.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/84324527259.pdf
    • https://cdn.shopify.com/s/files/1/0433/6271/3754/files/fugibetorudaz.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_off0000641b.bin
04572c344abc70c773a2e5b9b0019e251a82a0a23cb30d09d59215e2caaefc19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641B 5368 bytes
font_01_sfnt_off0000764c.bin
18be9076c1ed5b7b60351854bf6dc954be57965d4bc95c8f5925b6603ecb9c72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764C 9628 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.