Malicious PDF — malware analysis report

Static analysis result for SHA-256 de718cb7048c9446…

MALICIOUS

PDF

79.6 KB Created: 2020-07-25 13:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed049fec1a694b5601f0cf3ce1d5f5e0 SHA-1: 8fb0e58484a4170180ab90427319f21d425e33e7 SHA-256: de718cb7048c944671dad18d02103bab3cf9c8f9c81885df2b90314d1295ea33
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a financial report. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a deceptive document, leading to redirection to malicious sites.

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=las+vegas+sands+annual+report+2017
    • http://files.getpacificapps.com/uploads/1/3/1/1/131164152/d8d1f2bc82654.pdf
    • http://files.access2college.com/uploads/1/3/0/7/130776611/giseditikikesolesa.pdf
    • http://files.thegarbagefire.club/uploads/1/3/0/8/130813521/rumapewakusikib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/32684803482.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/webutegovudariporepuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7378/files/45352109921.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalekubaserigudopen.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/97103536150.pdf
    • https://cdn.shopify.com/s/files/1/0435/3274/6906/files/53351619885.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/sojojobefilajapikirubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/migaxeja.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/843

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1a.bin
7868d0c00814e9fb87b9b24842b32720a107d5c7adb9809c3d59cdbeb1e8ed8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 5368 bytes
font_01_sfnt_off0000ff74.bin
1590b21f8a0f00ae61777bc9c4dec49485a8537b83b0309d3b893951379123a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF74 15492 bytes