Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadf55badff3db24…

MALICIOUS

PDF

43.3 KB Created: 2020-08-02 04:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a44caa092703e89f5be9231f8f52209 SHA-1: 2afcc0e0e75c1346c199578ee16e6fe8d22e3977 SHA-256: aadf55badff3db2476b7ce7ebfe20e30208ba667a29ded384a81c6e18e54f6c9
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=random+company+names, which likely serves to obfuscate the ultimate destination of the attack. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, but the sheer volume of links and the redirector usage strongly suggest a malicious intent, likely for phishing or malware distribution.

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.ru/pify?keyword=random+company+names
    • http://files.millermommy.com/uploads/1/3/0/7/130775768/6235654.pdf
    • http://files.arielmakesmedia.com/uploads/1/3/1/4/131406435/febodujuzupet_diwimex.pdf
    • http://files.porthcawlmuseum.com/uploads/1/3/0/7/130739719/4416333.pdf
    • http://files.harborimpactministries.com/uploads/1/3/1/3/131380619/jewopupudusiregokud.pdf
    • http://files.fit-to-nzeb.com/uploads/1/3/1/4/131437627/zodarozekurako.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/bawupuluparevuteru.pdf
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/venijozutupit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/50033931581.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fedixudarat.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/nijedi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/wawevofomusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7781/1867/files/88011253207.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5805/files/69615414014.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/83917747393.pdf
    • https://cdn.shopify.com/s/files/1/0433/5019/6392/files/zinarawagiwikiduw.pdf
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/xewujavire.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006009.bin
d1b532e2e4f7f9536333c92175ff0db6b350a4b5213a0256223aa1408cc3ef2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 4860 bytes
font_01_sfnt_off00007075.bin
e24dc95e034e493bd64a9d2a04d135bef6515797733349295538065f6bc8a758
pdf-font-stream PDF embedded font (sfnt) at offset 0x7075 9888 bytes
font_02_sfnt_off0000925e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x925E 4324 bytes