Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb79104d95efaf6c…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 06:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d890c7d983d7fbb06e8d7ca69125313f SHA-1: d698b58ba9f348e4fc591a68ea67dc087b8dda6c SHA-256: eb79104d95efaf6c7ca5c98df8b45fa05ab686a46f304ed44a5c55c3710cf2a1
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, ttraff.com. The document body, though obfuscated, contains text related to 'Concierto de aranjuez violin sheet music pdf' and includes the malicious URL, suggesting a lure to trick users into clicking. The ML classifier also strongly indicated maliciousness.

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=concierto+de+aranjuez+violin+sheet+music+pdf
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdf
    • http://files.heatherkinser.com/uploads/1/3/2/3/132302966/7634812.pdf
    • http://files.wightmantennis.org/uploads/1/3/1/3/131383823/5cc153d.pdf
    • http://files.mschurchofchrist.net/uploads/1/3/1/3/131384436/7672464.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/dipavixejobirina.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/sewuteke.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/8162880241.pdf
    • https://cdn.shopify.com/s/files/1/0449/4393/3595/files/89559716969.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/ziraxizopebixagatogevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/lobularozov.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/79208634011.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/peratizesiju.pdf
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/troybilt_tuffy_tiller.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/nagifo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/vozetakib.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/91707258438.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_off0000698f.bin
392b3a069479bb1336e0d82ecdc46da62895f9d10ac7957dd4be3d6446a08ae0
pdf-font-stream PDF embedded font (sfnt) at offset 0x698F 5488 bytes
font_01_sfnt_off00007c1a.bin
bf67a0cf892cf7970d9c066eb98ebc600e2216e3e9fa1773a8dcfc0ab874d40c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1A 10444 bytes
font_02_sfnt_off00009fe6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE6 4324 bytes