Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce29d3fa5f9958c1…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 02:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7baf73dc0dd5537644281e9bd733ea1 SHA-1: d73804340dbe67e4bd0682047e8ed3121f0bc061 SHA-256: ce29d3fa5f9958c1526f8cdb5a9b446e38da8702bf680b0f55fbe48faf777d61
152 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text related to 'Arlington water quality report 2017', suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning and driving traffic to malicious sites.

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=arlington+water+quality+report+2017
    • http://files.bransoncitydiner.net/uploads/1/3/1/6/131636642/e7503e4847.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4734/files/parofudalixowufisowet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/xewisukir.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/mumizebepolavik.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/barbie_twin_sheets_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2540/files/cariotipo_y_cariograma.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/30218435737.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/jovumoxilaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/83830888289.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9799/files/xadifeb.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_off0000631c.bin
6af72585496ad8f3681ee9bb1d191232ccf65f58fc1dd0af76097970bd68c6bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x631C 5524 bytes
font_01_sfnt_off0000761d.bin
c34f6e554fc3dcf4f22edc1510cbc130d1d25811ef494f6b1a1a83ca341c80ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 10200 bytes