Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc749da88ff99c78…

MALICIOUS

PDF

42.9 KB Created: 2020-08-12 13:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 165ea40dae2cab5aa8cc8a3de9aab1c1 SHA-1: adf2d53a7e54e6ef0e7ab1374d0b61d370abef5e SHA-256: cc749da88ff99c7802b5f2c94018e076e0ee859a8cced17fd5b5b5694d47ad3b
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL. The presence of a mass external PDF link farm further indicates a malicious intent to distribute harmful content.

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.cc/pify?keyword=cash+flow+statement+in+tally+pdf
    • http://kasirejob.stephaniepercydoula.com/uploads/1/3/1/4/131453540/8731653.pdf
    • http://files.studioiarchitects.com/uploads/1/3/1/3/131379049/jexapusaba_petosujejoli_zagogobu_samafudukebux.pdf
    • http://buzumus.fromfullness.com/uploads/1/3/0/8/130814328/7965738.pdf
    • http://temugar.escapemachine.com/uploads/1/3/2/6/132681947/9433171.pdf
    • http://rujabe.voiceofhoperct.org/uploads/1/3/1/4/131453501/dccfb6.pdf
    • https://cdn.shopify.com/s/files/1/0432/2272/8866/files/5773212659.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/algorithms_robert_sedgewick_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3380/files/microcontroller_based_anesthesia_machine.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/apprendre_chinois_mandarin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6220/6357/files/session_horns_pro_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/ziserifixitaposuwefusuxo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/26489059973.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/56843823016.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/puzuxevalaxij.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_off00006a4a.bin
4668b07bd4573de49c282baa9b256e8b35909e302a3d67c2670d44c6fa5d464b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 5284 bytes
font_01_sfnt_off00007c3d.bin
e2bcbb50f6aa8f098d1c7fabbbeb8cdbc59965c2fd5675d2efc1c95f35c611b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3D 9984 bytes