Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdec40334df5390…

MALICIOUS

PDF

92.1 KB Created: 2020-08-25 01:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef22a4bb542106d620bc1a00e5319466 SHA-1: 867ef6538b754d1cdfb86392e525c8ecd6709265 SHA-256: abdec40334df53909af34d3cdc213d1dc9c42824fd43356d457eea3d40885056
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the PDF is designed to trick users into clicking the link, leading them to potentially harmful content or further malicious downloads.

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=karen+blixen+out+of+africa+pdf
    • http://vetaputip.homeenergyproducts.net/uploads/1/3/2/8/132815094/bodotigafufator-jijime-masozu-gamurola.pdf
    • http://files.elitekarate-fitness.com/uploads/1/3/1/4/131407315/1641701.pdf
    • http://files.dancestudiesuoft.ca/uploads/1/3/1/4/131411688/rawonazuveda.pdf
    • http://zuwig.omshantiyogaspain.com/uploads/1/3/1/4/131437850/267a9.pdf
    • https://cdn.shopify.com/s/files/1/0435/1413/4692/files/kepuborujaliperibebiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/guwijasakigopovitizaneso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/54582856604.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/ribevaguburiwetaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/download_zoom_recording.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/wetafisuromo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1725/4565/files/hukum_arbitrase.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/buku_akuntansi_keuangan_menengah_1_kieso.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/zefexok.pdf
    • https://cdn.shopify.com/s/files/1/0434/1815/7221/files/best_weather_app_for_android_2016.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/bupazesilomo.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_off00012d0e.bin
13755f3671fdb23f573dd9476935135e8597a20042354691640f48e1d4eef93a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0E 5148 bytes
font_01_sfnt_off00013e9a.bin
60ab56f3bb6c382124e073b9848fe2359ea0d97ddeb5e4bb4b25a649317ef92a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9A 10588 bytes