Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbc131c2f738f68…

MALICIOUS

PDF

55.9 KB Created: 2020-08-24 01:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d5908f559fced48d5fda10676fa01b SHA-1: 908dc293814e8f3badab66971da916070fcb851c SHA-256: 4cbc131c2f738f680bccb463178dabaa7a68aedf86a703b75e3d96080ad1794f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=gangster+bengali+movie++mp4', suggesting a lure to potentially malicious 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.ru/pify?keyword=gangster+bengali+movie++mp4
    • http://nesonaga.myeightcents.com/uploads/1/3/0/9/130969059/30448fdca66e81.pdf
    • http://files.auchengraychurchcentre.org/uploads/1/3/1/3/131379174/piwiveninaje.pdf
    • http://files.farmersandfamiliesforlivingston.com/uploads/1/3/0/7/130740517/wurufeme.pdf
    • http://files.jsstrangemysterynovels.com/uploads/1/3/1/3/131380354/82ca3e319.pdf
    • http://bltlly.com/15kpca
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/sepuzixekiweke.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/pafurima.pdf
    • https://cdn.shopify.com/s/files/1/0436/4668/1248/files/ancova_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/54887879119.pdf
    • https://cdn.shopify.com/s/files/1/0440/7794/0886/files/hindu_marriage_biodata_format_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/12475593431.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/54961478541.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/81106545118.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8838/files/free_auto_repair_invoice_and_estimating.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/metal_cutting_and_forming_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7197/files/mijaf.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000631a.bin
7492f59ebdf8fb88a18aecfe32492129259a8901d2e6c9e0790037fbd47a1b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 5248 bytes
font_01_sfnt_off000074dc.bin
f5787c3981350174eadb7cf6a868fc91215c0cf811b0c2b9fe2ee89131e4dbd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DC 6676 bytes
font_02_sfnt_off00008adf.bin
7b1a3755ff323cdc0ee0f63ca2eee7aa60f7629ca5408b2cbc2233daa3b9bbc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADF 10560 bytes
font_03_sfnt_off0000af1f.bin
4b39140c652e6d058fe59e0172338ed7e0b8c56e7cdf0ba82c6c8c4172db5d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1F 16144 bytes
font_04_sfnt_off0000c418.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC418 4324 bytes

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