Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6a3b273587f1d0…

MALICIOUS

PDF

34.9 KB Created: 2020-08-02 10:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4c099d72570e069511f2c1c2eac3756 SHA-1: 79e2330ecfdff4e309523af76d3e54e0612fe3a0 SHA-256: 9c6a3b273587f1d04b835b4ce729810bf61b8433e30241bdfec1b2f6325a56d6
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=arizona+master+gardener+manual+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous external links, many hosted on shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirect URL, suggesting the primary intent is to redirect the user to a malicious site.

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=arizona+master+gardener+manual+pdf
    • http://files.neverthirstagain.co.uk/uploads/1/3/1/4/131482976/dodazipodi-jaxopabenu.pdf
    • http://files.justanhrgirl.com/uploads/1/3/0/7/130774993/vemawe-giretinaduzu.pdf
    • http://files.tiffanysalonspa.com/uploads/1/3/1/8/131858540/jibuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/59187039372.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/fakemedumoxowexotasonem.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/muxidajabunijabonaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/64141774820.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/91123523117.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2741/files/buxusesozoxoxapaseroliler.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/40928805118.pdf
    • https://cdn.shopify.com/s/files/1/0438/5010/4982/files/37576168214.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/1126973039.pdf
    • https://cdn.shopify.com/s/files/1/0434/9050/8960/files/muwowumagegomenomobaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/zarevudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30151397197.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_off000049c1.bin
b181fb915a62f709ec387536ef161d1550c1e72c219c102cc5bf709c314d714f
pdf-font-stream PDF embedded font (sfnt) at offset 0x49C1 5400 bytes
font_01_sfnt_off00005c11.bin
76dd375c732380327dd8cd768ece3bff0280167aafabff26950457fe4bf9c5fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C11 10400 bytes