Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97b9b46c202f162…

MALICIOUS

PDF

45.2 KB Created: 2020-08-01 05:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c2f18b94023716fdc9929a42c7e2e68 SHA-1: 47b131d8d2b4f4713dc8a07dd97d6f4376d5ed6b SHA-256: a97b9b46c202f16269a3abc83c5526a48ea8d700d9bb0ec54420cbb1f9371f0c
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of external PDF links, many hosted on 'cdn.shopify.com', suggesting an SEO spam or link farm tactic. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be the distribution of malicious links within the PDF.

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=random+number+javascript+range
    • http://files.kennyandtinagreene.com/uploads/1/3/1/3/131384771/9540159.pdf
    • http://files.wisdomgap.org/uploads/1/3/1/4/131456012/4f72c248.pdf
    • http://files.artbyvicki.net/uploads/1/3/0/7/130740142/861ace9223c5.pdf
    • http://files.emeraldtreeexperts.net/uploads/1/3/2/7/132710748/8001007.pdf
    • http://files.hydramovement.com/uploads/1/3/1/3/131398100/demuzuvoro_gavixixobagidod_kexopevebegopiv_poriralowo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/safari_specific_css.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/19152443814.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/tabizafudujuzodedisixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6600/7457/files/lutesipulugetojalawiba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/19079013322.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/famifejajebakorij.pdf
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/29372691615.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/20563515591.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/bopalozarituv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/sony_ericson_w_580i.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5637/files/83319897883.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1129/files/xulavigoketuki.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_off00006aa3.bin
ea72b29716218f37fc4357970217f436760376fe302128ed105270b167d5a6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA3 5644 bytes
font_01_sfnt_off00007dcc.bin
92c03404db8bad2a49e388bad7b061d9aa59575de73568889ffbed4980d1c9db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCC 12892 bytes

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