Malicious PDF — malware analysis report

Static analysis result for SHA-256 273452b9b272efda…

MALICIOUS

PDF

123.9 KB Created: 2020-07-29 19:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e5f9a3ff95c8ab46061e947a96b3b8 SHA-1: f8ad88f24c4f4d7c880bae2a5e4855fb1ace1e5d SHA-256: 273452b9b272efda9d42827d58c95b55495a4660b4a0c71651d8aad1efc6e4c2
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, forming a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is ttraff.cc, which is known for redirecting to harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=tutsak+%25C3%25A7al%25C4%25B1ku%25C5%259Fu+pdf
    • http://files.simplybalanced3.net/uploads/1/3/2/3/132303229/0fe8d2225fe5206.pdf
    • http://files.conwaycountycarecenter.com/uploads/1/3/0/8/130813906/5f05f60dcc6.pdf
    • http://files.earth-protect.org/uploads/1/3/0/7/130739155/kilat.pdf
    • http://files.glitzstudiodesigns.com/uploads/1/3/0/7/130738913/ropewajujib-vumoju-lesemu-medirebawonak.pdf
    • http://files.christianpeco.com/uploads/1/3/2/8/132814473/56be30e70a.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/18419190915.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/15730109435.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/fiwiwosukatune.pdf
    • https://cdn.shopify.com/s/files/1/0434/3411/5233/files/joverine.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/11220155887.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/nejinulitoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33540287451.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/56346782287.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/diwutuxanekamewujobowared.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/xolopukulupiwugadisaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31443612403.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdf
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/90802010217.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/pefugatunekapobixa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/mimobosibafolipajije.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_off0001ab3a.bin
27882bde162a4ea657e56fec70fc0be2a794d95ec31fe8658d804ea130d9400c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB3A 4912 bytes
font_01_sfnt_off0001bb4e.bin
cd77b7a90a123aa58a22ed1061188fd83ceb8908aff29b2cd2d0c2c462f71104
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB4E 11944 bytes