Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14fdb47c92b9447…

MALICIOUS

PDF

43.6 KB Created: 2020-08-04 04:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2363eb3049d7db7e3a025c300502ed7d SHA-1: 1383cbb1e7a0149a6ca15c2f45d5c9f97679dee7 SHA-256: d14fdb47c92b9447136905e7b61a8df66252beb6545b2b035660dac2ef23c868
154 Risk Score

Malware Insights

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

The PDF contains a link farm of numerous PDF files hosted on various domains, including a primary redirector URL. The ML classifier strongly indicates maliciousness. The document body, though obfuscated, contains the primary malicious URL and references to other PDF files, suggesting a lure to a malicious site designed to host further malicious 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.ru/pify?keyword=estructura+de+la+administracion+publica+en+guatemala+pdf
    • http://files.ornamentsofexpression.com/uploads/1/3/1/4/131438260/94ea0ed.pdf
    • http://files.wanderwellfitness.com/uploads/1/3/0/8/130813095/xojenojafepel.pdf
    • http://files.nicecurb.org/uploads/1/3/1/4/131406181/guxudimedowo_sinijutupojozu_vimegejajix.pdf
    • http://files.staccounting.co.uk/uploads/1/3/1/3/131397971/pisedegomeva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
    • https://cdn.shopify.com/s/files/1/0438/2015/5037/files/58239168822.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/fenagirunilirazamajixekis.pdf
    • https://cdn.shopify.com/s/files/1/0447/0787/2921/files/angular_ui_router_min_js.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/xibegexola.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/5273794016.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/lanitaxanuvetikajosulofe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/58301039255.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/duxafile.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/candlesticks_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/busedo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1962/4870/files/35674231759.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_off00006845.bin
c479e30d42f1e1371f0c965e8f0f06e3dd03d43fd49d999578afeadf0e53e558
pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 5572 bytes
font_01_sfnt_off00007b21.bin
79eeede395761afff21f1e4556512f7eb73c6bb7214fb8c7e900dbc7ff02b032
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B21 11204 bytes