Malicious PDF — malware analysis report

Static analysis result for SHA-256 948039abd767a6e6…

MALICIOUS

PDF

44.4 KB Created: 2020-08-23 02:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f145dc32bc8dbdefe730ba675dadd3ed SHA-1: 3f60393d05e79e1003c9f31ad131e8dcd8f981f4 SHA-256: 948039abd767a6e6b46728567bb96e9fedbbdb128a9a2f896be55567744cee87
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service or potentially malicious domains. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to funnel users to harmful sites. The ML classifier also strongly flagged this PDF as malicious. 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.cc/pify?keyword=apology+for+poetry+by+philip+sidney+pdf
    • http://fopep.jadasinn.com/uploads/1/3/0/7/130775027/xomexugaxifu.pdf
    • http://files.estherkaplin.com/uploads/1/3/0/8/130814346/zirapaxinetozoreku.pdf
    • http://fajek.theangelicdebt.co.uk/uploads/1/3/1/4/131453028/eb77834c9d1107.pdf
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/77071668182.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/teks_qasidah_burdah.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/rovezibetatas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/2888435625.pdf
    • https://cdn.shopify.com/s/files/1/0437/5825/6286/files/pujuraxiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jufozigazagapuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/ligavojed.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/sql_server_2008_books_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/39471590500.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/98947066608.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/mudetovugepulonapaliz.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_off000070e6.bin
af7a96af55446283c88319f8451d14ca356183de03721950da144b2f7ef0f565
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E6 5324 bytes
font_01_sfnt_off000082fd.bin
3474ef338152db91a79df2887219d2cd9fe27bef0b4d23ccdaae36257fcbe3ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x82FD 9836 bytes